Datasheet

SELF DIAGNOSIS DESCRIPTION AND CHECK POINT TABLE
In the event of breakdown, proceed as follows to detect the error code.
1. Press “CHECK” button at the remote control continuously for more than five seconds to turn on diagnosis mode. “_ _” will be displayed at the remote control LCD.
2. By pressing the TIMER “▲” button once, the next error code (if any) will be displayed; press “▼” button once, previous error code will be displayed.
3. If error code displayed matches the error code saved in unit memory (abnormality detected) Indoor PCB will buzzer for 4 seconds to indicate the correct error code.
4. If “CHECK” button is pressed again or without any operation for 30 seconds, the diagnosis mode will turn off.
5. Turn ON the unit and reset the error code by pressing the AC reset.
CHECK
ERROR CODES TABLE
Warning: Electrical power must be disconnected when terminal protective cover is not in place to protect against electrocution.
Diagnosis
Display
Abnormality /
Protection Control
Diagnosis Method Diagnosis Checkpoint
H11 Indoor/Outdoor
abnormal
communication
This trouble display appears when indoor/outdoor unit communication fails to be established after 30 or more
seconds.
Measure the voltages of the indoor/outdoor unit communication cables, and check whether the voltage is being
supplied properly to the outdoor unit or whether it is being returned from the outdoor unit to the indoor units.
H12 Indoor unit capacity
unmatched
This trouble display appears when wrong in the total connection capacity and wrong connection in each capacity.
The trouble is determined within 2 minutes after the power is turned on.
Check the total capacity of the units connected and check that the models are compatible for connection.
H14 Intake air temp.
sensor
This trouble display appears when the intake air temperature has exceeded above 46ºC continuously for 2 minutes
or dropped below -54ºC continuously for 5 seconds during operation.
This trouble display appears when a temperature which is impossibly high or low from a normal standpoint has
been detected. Check the sensor, and if open-circuiting (0L or ∞) or short-circuit is not found, defective contact of
the connector is to blame.
H15 Outdoor compressor
temperature sensor
abnormality
— Check the sensor, and if open-circuit (more than 500 k) or (short-circuit) (less than 6.5 k) is not found, defective
contact of the connector is to blame.
H16 Outdoor Current
Transformer
CU-2E: When a value of under 1.5A has been detected for the total current during operation beyond the set
capacity, the compressor operates with its operating frequency controlled to a maximum of 38Hz for 3 minutes,
and if it continues to operate at a total current of under 1.5A for another 3 minutes, its operation stops.
CU-3E/4E: When the total current has dropped below the set current level continuously for 20 seconds during
operation beyond the set capacity, operation is stopped. Three minutes later, operation is started up again, and
when the trouble occurs on 4 successive occasions, the trouble display appears (the timer lamp blinks).
1. Check the refrigerant cycle: Gas may be leaking (the amount of refrigerant is extremely low).
2. Check the control PCB: Check for a broken wire (open circuit) in the current transformer. (If an open circuit is
found, replace the control PCB) In the case of a scroll compressor (DC motor), H16 is detected only when the
regular compressor is operating.
H19 Indoor fan motor
mechanism lock
· High-voltage PWM: When a state in which the fan motor speed is not synchronized with the control signal has been
detected on 7 successive occasions.
· Low-voltage PAM: When the fan lock detection signal has been detected on 7 successive occasions or it has been
detected continuously for 25 seconds or when a state in which the fan motor speed is not synchronized with the control
signal has been detected on 7 successive occasions: The trouble display appears (the timer lamp blinks).
1. Check the nature of the fan lockup trouble.
2. Check for disconnections of the fan motor connectors and for defects in contact, in the fan motor and in the
control PCB.
H23 Indoor heat exchanger
temp. sensor
This trouble display appears when a temperature of under approximately -40ºC or above approximately 80ºC has
been detected by the heat exchanger temperature sensor continuously for 5 seconds. (This trouble is not detected
during de-icing.)
This trouble display appears when a temperature which is impossibly high or low from a normal standpoint has
been detected. Check the sensor, and if (open-circuit) (0L or ∞) or short-circuit is not found, defective contact of
the connector or a defective control PCB is to blame.
H26 Ionizer Abnormality — 1. Measure the voltages of the indoor unit communication cables, and check whether the voltage is being supplied
properly. 2. Check the ionizer needle and grounding plate is dust free.
H27 Outdoor air temp.
sensor
This trouble display appears when a temperature of under approximately -40ºC or above approximately 150ºC has
been detected by the outside air temperature sensor for 2 to 5 seconds. (This trouble is not detected during
de-icing.)
This trouble display appears when a temperature which is impossibly high or low from a normal standpoint has
been detected. Check the sensor, and if open-circuiting (0L or ∞) or short-circuit isnot found, defective contact of
the connector or a defective control PCB is to blame.
H28 Outdoor heat
exchanger temp.
sensor 1
This trouble display appears when a temperature of under approximately -60ºC or above approximately 110ºC has
been detected by the heat exchanger temperature sensor for 2 to 5 seconds. (This trouble is not detected during
de-icing.)
This trouble display appears when a temperature which is impossibly high or low from a normal standpoint has
been detected. Check the sensor, and if open-circuiting (0L or ∞) or short-circuit is not found, defective contact of
the connector or a defective control PCB is to blame.
H30 Outdoor discharge
pipe temp. sensor
CU-2E: This trouble display appears when a temperature of under approximately -16ºC or above approximately
200ºC has been detected by the outlet temperature sensor for 2 to 5 seconds.
CU-3E/4E: Disconnected discharge sensor · When the condensation temperature is higher than the discharge
temperature + (plus) 6ºC, a sensor disconnection is detected, operation stops, and the trouble display appears
(the timer lamp blinks).
This trouble display appears when a temperature which is impossibly high or low from a normal standpoint has
been detected. Check the sensor, and if open-circuiting (0L or ∞) or short-circuit is not found, defective contact of
the connector or a defective control PCB is to blame.
H32
Outdoor heat exchanger
temp. sensor 2
(discharge pipe temp.)
This trouble display appears when a temperature of under approximately -60ºC or over approximately 110ºC has
been detected continuously for 2 to 5 seconds by the outlet temperature sensor of the heat exchanger.
This trouble display appears when a temperature which is impossibly high or low from a normal standpoint has
been detected. Check the sensor, and if open-circuiting (0L or ∞) or short-circuit is not found, defective contact of
the connector or a defective control PCB is to blame.
H33 Indoor / Outdoor
wrong connection
Indoor / Outdoor different model junction, 100V charge into 200V outdoor unit. Check whether the voltage is being supplied properly to the outdoor unit or whether it is being returned from the
outdoor unit to the indoor units.
H34 Outdoor heat sink
temp. sensor
This trouble display appears when a temperature of under -43ºC or above 80ºC has been detected by the outdoor
unit radiator fin sensor continuously for 2 seconds.
This trouble display appears when a temperature which is impossibly high or low from a normal standpoint has
been detected. Check the sensor, and if open-circuiting (0L or ∞) or short-circuit is not found, defective contact of
the connector or a defective control PCB is to blame.
H36 Abnormal gas pipe
temp. sensor
This trouble display appears when a temperature of under approximately -45ºC or above approximately 149ºC has
been detected by the outdoor unit gas side pipe temperature sensor continuously for 2 to 5 seconds.
This trouble display appears when a temperature which is impossibly high or low from a normal standpoint has
been detected. Check the sensor, and if open-circuiting (0L or ∞) or short-circuit is not found, defective contact of
the connector or a defective control PCB is to blame.
H37 Outdoor liquid pipe
temp. sensor
This trouble display appears when a temperature of under -45ºC or above 149ºC has been detected by the outdoor
unit liquid side pipe temperature sensor continuously for 2 seconds.
This trouble display appears when a temperature which is impossibly high or low from a normal standpoint has
been detected. Check the sensor, and if open-circuiting (0L or ∞) or short-circuit is not found, defective contact of
the connector or a defective control PCB is to blame.
H38
Indoor / Outdoor
mismatch (brand code)
— —
H39 Abnormal indoor
operating unit or
standBy units
This display appears in rooms other than one in which indoor freezing trouble has occurred when the pipes have
been connected incorrectly, when an outdoor expansion valve is defective or when an expansion valve connector
has become disconnected.
—
H41 Abnormal wiring or
piping connection
CU-2E only This display appears when this kind of trouble is detected 3 minutes after a forced cooling operation
was conducted for one room during the initial operation after the power was turned on. It appears when:
· The indoor unit pipe temperature in a room without the capacity supply available at an outside air temperature
above 5ºC has dropped by more than 20ºC to 5ºC or lower 3 minutes after the compressor started up. · The
outdoor unit gas pipe temperature in a room without the capacity supply available has dropped by more than 5ºC
to 5ºC or lower 3 minutes after the compressor started up.
—
H50 Ventilation failure This display appears when ventilation motor is lock. 1. Check the voltage drop at pin 1 & 2 of CNVENT to have 14Vdc. 2. Check the ventilation hose condition from
ventilation opening until tip cover. 3. Check air fl ow from tip cover by hand.
OPTIONAL ACCESSORIES
REPLACEMENT ANTI-ALLERGEN FILTER
PIPE REDUCER (for Multi) PIPE EXPANDER (for Multi)
CS-E9/12/15/18/21HKEA CS-PW9/12/18GKE, CS-PW24JKE, CS-V7DKE,
CS-V9DKE, CS-V12DKE, CS-V18DKE, CS-V24DKE,
CS-V28EKE, CS-E15DTEW, CS-E18DTEW, CS-E21DTES
CS-RE9/12/18/24JKE-1 CZ-MA1P is to be used to reduce the connection size
on the indoor unit to 3/8". CS-E15/18/MKEW,
CS-E15/18DTEW, CS-E15/18HB4EA, CS-E15/18JD3EA,
CS-E18GFEW, CS-E18GFEW, CS-XE15/18MKEW
CZ-MA2P is to be used to increase the connection
size on the outdoor unit to 1/2". CS-E21MKEW,
CS-XE21MKEW, CS-E21JB4EA
CZ-SA13P CZ-SA14P CZ-SA16P CZ-MA1P CZ-MA2P
H51 Vacuum Nozzle Failure This display appears when the vacuum nozzle stop. This trouble display appears when suction nozzle stop at centre of the Filter Cleaning device: 1. Check the filter
setting position. 2. Check the nozzle drive stepper motor running condition.
This trouble display appears when suction nozzle stop at left side of Filter Cleaning device: 1. Check vacuum nozzle
position. 2. Check the left limit switch switching function by multitester.
This trouble display appears when suction nozzle stop at left side of Filter Cleaning Device: 1. Check the Right Limit
Switch switching function by multitester.
H52 Limit Switch Failure This display appears when both Limit Switch (left & right) detected short circuit. 1. Unplug the CNSIDESW connector and check Pin 1-2 and Pin 3-4 condition on PCB.
2. Check wiring condition at limit switch (left & right).
3. Check switching function of limit switch (left & right).
H97 Outdoor fan motor
mechanism lock
CU-2E: When trouble, which is defi ned as a state in which the fan motor speed is not synchronized with the control
signal has been detected on 5 successive occasions, has occurred for the third time in a 60-minute period and twice
during a 30-minute period, the trouble display appears, and operation stops. CU-3E/4E: When the fan motor speed
detected when its maximum output is demanded is below 30 rpm continuously for 15 seconds, the fan motor stops
for 3 minutes and then restarted. When this happens on 16 occasions (the trouble display is cleared when the value
is normal for 5 minutes), the H97 diagnostic symbol is stored in the memory, and the fan motor stops.
1. Check the nature of the fan lockup trouble.
2. Check for disconnections of the fan motor connectors and for defects in contact, in the fan motor and in
the control PCB.
H98 Indoor high pressure
protection
The restriction on the compressor frequency is started when the temperature of the indoor unit heat exchanger
source is between 50ºC and 52ºC, the compressor stops at a temperature from 62ºC to 65ºC, it is restarted 3
minutes later at below 62ºC to 65ºC, and the restriction on the compressor frequency is released at a temperature
between 48ºC and 50ºC. (No trouble display appears.)
1. Check the indoor unit heat exchanger temperature sensor (check for changes in its characteristics and check its
resistance): Symptoms include no hot start when operation is started, a failure of the thermostat to turn on (no
outdoor unit operation). And frequent repetition of stopping and startup.
2. Check also for short circuits indoors and clogging of the air fi lters.
H99 Indoor operating unit
freezing
The restriction on the compressor frequency is started when the indoor unit heat exchanger temperature is
between 8ºC and 12ºC. Operation stops if a temperature below 0ºC continues for 6 minutes. Three minutes later,
operation is started up at a temperature from 3ºC to 8ºC. The restriction on the compressor frequency is released
at a temperature between 13ºC and 14ºC.
1. A cooling or dry mode operation conducted at a low outside air temperature is mainly to blame: this is not
indicative of any malfunctioning. If the outside air temperature rises during automatic operation in the winter
months, the dry mode operation is selected. The H99 diagnostic display also appears at such a time.
2. Check the refrigerating cycle: Gas may be leaking (the amount of refrigerant is low) or a pipe may be broken, etc.
3. Check also for short circuits indoors and clogging of the air fi lters.
F11 4-way valve switching
failure
CU-2E: When the indoor unit heat exchanger temperature is under -5ºC during a warming operation or above 45ºC
during a cooling or dry mode operation four minutes after the compressor has started up, the F11 diagnostic
symbol is stored in the memory, and operation stops. 3 minutes later, operation is restarted. This trouble display
appears when this happens on 4 occasions in a 30 minutes period.
CU-3E/4E: When a difference of 0ºC to 5ºC has been detected between the outdoor unit heat exchanger
temperature and liquid side pipe temperature on 5 occasions, the trouble display appears.
1. Check the 4-way valve coil: Check that no power is supplied to the coil during cooling and dry mode operations,
and that power is supplied during heating operations. Inspect the coil for broken wires (open circuits).
2. If the coil is troublefree, the switching action of the 4-way valve may be defective.
F17 Indoor standBy units
freezing
CU-2E: After the operation of one indoor unit stops continuously for 5 minutes. The hole operation stops when the
stopping indoor unit pipe temperature is under -5ºC continuously for 1 minute or under 0ºC continuously for 5
minutes, and operation restarts after 3 minutes. This trouble display appears if that trouble happens on 3
occasions in a 30 minutes period.
CU-3E/4E: When the difference of an intake temperature (room temperature sensor) and the indoor unit heat
exchanger temperature (piping sensor) is higher than 10ºC or an indoor unit heat exchanger temperature of below
-1ºC has been detected continuously for 5 minutes, operation stops. Three minutes later, it is started up, and the
trouble display appears when this has occurred on 3 consecutive occasions.
1. Check the refrigerating cycle: Expansion valve leakage.
2. Check the indoor unit pipe temperature sensor (check for changes in its characteristics and check its
resistance).
F90 PFC circuit protection
(CU-2E)
CU-2E: When the reputation of the compressor is not synchronized with the control signal, the F93 diagnostic
display is stored in the memory, and operation stops. 3 minutes later, operation is restarted. This trouble display
appears when this happens on 4 occasions in a 20 minutes period. CU-3E/4E: When a state in which the rotation
of the compressor is not synchronized with the control signal has been detected on 8 successive occasions,
operation stops, and the trouble display appears.
1. To check whether the 2-way or 3 -way valve has been left open by mistake, operation is performed for one to
several minutes after the compressor has started up, F93 is stopped in the memory as the symptom, and operation
stops.
2. Check the Inverter circuit (for open circuits) in the control PCB: Check the IPM base current (6 locations) within
3 minutes after the power has been turned back on. As the symptom, F93 is stored in the memory 30 seconds after
the compressor has started up, and operation stops. The trouble display appears after 4 restarts.
3. Check for broken wires (open circuits) in the compressor winding: Approximately 1 ohm under normal conditions
for each phase (same symptom as in 2.)
Main circuit low
voltage (CU-3E/4E)
F91 Refrigeration cycle
abnormality
CU-2E: When the rotation speed of the compressor exceeds the setting frequency and the total current is 1.5A or
higher to 1.9A or lower continuously for 5 minutes, operation stops if the indoor unit heat exchanger temperature is
higher than 20ºC during cooling or dry operation or if it is under 25ºC during heating. Three minutes later, it is
restarted, and if the trouble occurs on 2 consecutive occasions in a 20 minutes period, the trouble display appears.
CU-3E/4E: When the compressor frequency is above 55 Hz and the current drops below the prescribed level
continuously for 7 minutes, operation stops, and it is restarted 3 minutes later. When the compressor discharge
temperature has exceeded the setting and the expansion valve has remained fully open for 80 seconds, operation
stops, and it is restarted 3 minutes later. When the stopping described above has occurred on 4 occasions,
operation stops, and the trouble display appear.
Check the refrigerating cycle: Gas may be leaking (more than onehalf of the volume of the gas has gone). The
diagnostic displays resulting from a gas leak generally change in the following sequence depending on the extent
of the gas leak: H99 > F97 > F91 > H16. The range of this trouble (F91) is limited. (Compressor protection at the
start of the season).
F93 Compressor abnormal
revolution
CU-2E: When the reputation of the compressor is not synchronized with the control signal, the F93 diagnostic
display is stored in the memory, and operation stops. 3 minutes later, operation is restarted. This trouble display
appears when this happens on 4 occasions in a 20 minutes period. CU-3E/4E: When a state in which the rotation
of the compressor is not synchronized with the control signal has been detected on 8 successive occasions,
operation stops, and the trouble display appears.
1. To check whether the 2-way or 3 -way valve has been left open by mistake, operation is performed for one to
several minutes after the compressor has started up, F93 is stopped in the memory as the symptom, and operation
stops.
2. Check the Inverter circuit (for open circuits) in the control PCB: Check the IPM base current (6 locations) within
3 minutes after the power has been turned back on. As the symptom, F93 is stored in the memory 30 seconds after
the compressor has started up, and operation stops. The trouble display appears after 4 restarts.
3. Check for broken wires (open circuits) in the compressor winding: Approximately 1 ohm under normal conditions
for each phase (same symptom as in 2.)
F95 Outdoor high pressure
protection
CU-2E only: When the temperature of the outdoor unit heat exchanger temperature sensor exceeds 63ºC, the F95
diagnostic symbol is stored in the memory, and operation stops. 3 minutes later, operation is restarted at a
temperature below 56ºC. This trouble display appears when this happens on 4 occasions in a 20-minutes period.
1. Check the outdoor unit heat exchanger temperature sensor (check for changes in its characteristics and check
its resistance).
2. Check whether something is interfering with the dissipation of the heat outdoors.
F96 Power transistor
module or compressor
overheating (CU-2E)
Compressor high
discharge temperature
(CU-3E/4E)
CU-2E: Heating is detected inside the IPM which shuts itself off, the F96 diagnostic symbol is stored in the
memory, and operation stops. 3 minutes later, operation is restarted. The trouble display appears when this
happens on 4 occasions in a 30-minutes period.
CU-3E/4E: When this trouble is detected from the electrical parts radiation fi n temperature sensor and OLP
output during operation, operation stops, and it is restarted 3 minutes later. If the trouble occurs on 4 occasions,
operation stops, and the trouble display appears.
1. Something may be interfering with the dissipation of the heat outdoors or the outdoor unit fan may be defective.
(The outdoor unit fan is not running.).
2. Defective IPM (outdoor unit control PCB).
3. Gas leaks. 2-way or 3-way valve is not opened.
F97 Compressor high
discharge temperature
When the temperature of the compressor temperature sensor exceeds 112 to 120ºC, the F97 diagnostic symbol is
stored in the memory, and operation steps. Two minutes later, operation is restarted at a temperature below 107
to 110ºC.
CU-2E: The trouble display appears and operation stops when this happens on 4 occasions in a 20 minutes period.
CU-3E/4E: This trouble display appears and operation stops when this happens on 6 occasions (it is cleared when
the operation is normal for 20 minutes).
1. Check the refrigerating cycle: Gas may be leaking (the amount of refrigerant is low). The stopping of the outdoor
unit from time to time is a symptom of this trouble.
2. When operation steps with this trouble display appearing, check the compressor temperature sensor (check for
changes in its characteristics and check its resistance).
3. Something may be interfering with the dissipation of the heat outdoors or the outdoor unit fan may be defective.
(The fan will not run because of an open circuit.) (The protection function may be activated by an overload, and the
F97 trouble display will remain stored in the memory.).
F98 Total running current
protection
CU-2E: When the total current exceeds the setting, the F98 diagnostic display is stored in the memory, and
operation stops. 3 minutes later, operation is restarted. The trouble display appears and operation stops when this
happens on 3 occasions in a 20-minutes period.
CU-3E/4E: When the total current exceeds the setting (17A to 20A), frequency control is started, and if it then
exceeds the setting, operation stops, and the trouble display appears.
1. Check the AC voltage at the outdoor unit terminal board during operation: The voltage drop must be within 5% of
the voltage when operation has stopped (± 110% of rated voltage even during operation). If the voltage drop
exceeds 5% or if the voltage changes suddenly, inspect whether the power supply cord and indoor/outdoor unit
connection cables are too long or too small in diameter, etc.
2. Check whether something is interfering with the dissipation of the heat outdoors (during cooling operations):
Normally, the capacity is limited by the current so that the outdoor unit don’t stop, and the diagnostic display does
not appear.
F99 DC peak detection CU-2E: If the current level exceeds 22.5A after startup, the compressor stops, and it is restarted 3 minutes later.
When this occurs on 7 consecutive occasions, operation stops, and the trouble display appears.
CU-3E/4E: When “Output current trouble”, which occurs when the prescribed current level is exceeded, has
occurred on 16 consecutive occasions, operation stops, and the trouble display appears.
1. Check whether the compressor is defective (locked up or shorted winding). Check the outdoor unit control PCB.
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DOMESTIC