Unit installation

TROUBLESHOOTING
P31 OF 38
YMGI, A COMFORT MAKER, A JOY COMPANION, A SATISFACTION GUARANTOR...
TROUBLESHOOTING
P32 OF 38
YMGI, A COMFORT MAKER, A JOY COMPANION, A SATISFACTION GUARANTOR...
4
Cooling, dehumidifying: compressor
stops running, indoor fan motor
works. Heating: all will stop running.
The circuit on API has malfunction,
replace the outdoor unit API.
Whole unit's
current testing
malfunction
Off 3s
blink 13
times
U5
1) Power supply is not stable,
fluctuation is too much;
2) Power supply is too low,
overload is too much.
Cooling, dehumidifying, compressor,
outdoor fan motor will stop, indoor
fan will work, heating; all will stop
Off 3s
blink
5 times
AC overload
protection
E5
5
Please refer to trouble shooting
Cooling, compressor will stop,
indoor fan motor works. Heating;
all will stop.
Indoor and
outdoor units
communication
malfunction
E6
Off 3s
blink
6 times
6
Please refer to trouble shooting
Cooling, compressor will stop,
indoor fan motor works. Heating;
all will stop.
Off 3s
blink
8 times
E8
Anti-high tcmp.
protection
Indoor unit
motor no
feedback
H6
Off 3s
blink
11
times
Whole unit will
stop to run
1) Poor insert for GPF;
2) Indoor control board API
malfunction;
3) Indoor motor M1 malfunction.
7
Jump wire cap
mal function
protection
C5
Off 3s
blink
15
times
Whole unit will stop to run
Indoor control board
APl jump cap poor connected,
please reinsert or replace
the jump cap.
8
1) Room temp. sensor is not
connected with the control
panel AP1;
2) Room temp. sensor is damaged.
Cooling, dehumidifying: indoor fan
motor is running, other overloads
will stop; Heating, whole unit will
stop to run.
Off 3s
blink
once
F1
Indoor ambient
sensor open
circuit,
short circuit
9
Indoor
evaporator
sensor circuit,
open, short
circuit
F2
Off 3s
blink
twice
Cooling, dehumidifying: indoor fan
motor running, other overload will
stop; Heating, whole unit will stop.
1) Tube temp. sensor is not
connected with the control panel
AP1;
2) Tube temp. sensor is damaged.
10
Outdoor room temp. sensor hasn' t
connected well, or damaged, please
refer to the sensor resistance value
for checking.
Cooling, dehumidifying: compressor
will stop, indoor fan motor will work.
Heat: all will stop
Off 3s
blink
three
times
F3
Outdoor
ambient
sensor circuit
open, circuit
short
11
Outdoortub temp. sensor hasn' t
connected well, or damaged,
please refer to the sensor resistance
value for checking.
Cooling, dehumidifying: compressor
will stop, indoor fan motor will work.
Heat: all will stop
Off 3s
blink
18
times
Outdoor
condensor
sensor open
circuit, short
circuit
12
13
14
15
16
F4
Cooling, dehumidifying: after running
for 3mins later, the compressor will
stop to run, indoor fan motor will
start to run. heating: after run 3mins
later, all will stop to run.
1) Exhaust temp sensor hasn' t
connected well, or damaged,
please refer to the sensor ;
resistance value for checking.
2) Sensor head hasn' t insert into
the copper tube.
Off 3s
blink
5
times
F5
Outdoor air
exhaust
sensor
open circuit,
short circuit
Please refer to troubleshooting
1) Input power supply is too low;
2) System voltage is too high,
overload is too much.
Overload normal operation,
compressor is running, frequency
descending
Overload normal operation,
compressor is running, frequency
descending
Off 3s
blink
6 times
Off 3s
blink
8 times
F8
F6
Overload limit/
descending
frequency
Over current
need
frequency
descending
1) Overload is too much, ambient
temp. is too high;
2) Refrigerant is short;
3) Electric expansion malfunction.
Overload normal operation,
compressor is running, frequency
descending.
Off 3s
blink
9 times
F9
Air exhaust
over high
need frequency
descending
17
1) Testing wire terminal L and N
position If higher than 265VAC,
please cut off the power supply
and restart until back to normal;
2) If input voltage is normal, testing
the voltage of electrolytic
capacitor on API after turn on the
unit. There may be some problem
and replace the API if the
electrolytic capacitor voltage
range at 200-280V.
Cooling, dehumidifying, compressor
stop running fan motor works.
Heating: all will stop.
Off 3s
Blink
11
times
PH
DC generatrix
voltage
is too high
Cooling, dehumidifying: compressor
stops running, indoor fan motor
works. Heating: all will stop running.
Please refer to troubleshooting (IPM
protection, compressor lose steps,
compressor current overcorrect
protection).
P5
Off 3s
blink 15
times
Compressor
current
overcorrect
protection
Under the heating mode,
compressor running, indoor/outdoor
fan motor stop working
It is normal function
H1
H2
Off 3s
blink
once
Off 3s
blink
twice
Defrosting
Electrostatic
dedust
protection
Cooling, dehumidifying; compressor
stops running, indoor fan motor
works. Heating: all will stop running
1) Wire terminal OVC-COMP loosen
or circuit, has problem, the
resistance of SAT should be lower
than l ohm.
2) Please refer to troubleshooting
(exhaust/overload protection)
H3
Off 3s
blink 3
times
Compressor
overload
protection
Overload normal works, compressor
running, frequency declines
Pls refer to troubleshooting
Pls refer to troubleshooting
Pls refer to troubleshooting
Replace the outdoor control board
API
Replace the outdoor control board
API
Replace the outdoor control board
API
Pls refer to Part 3 capacitor charging
fault of troubleshooting
To check whether the ambient
Temp. of IPM is too high or the heat-
sinhing of IPM is dirty else replace
the outdoor baord API
H4
H5
HC
H7
H0
Lc
U1
EE
PU
P7
P8
Off 3s
blink 4
times
Off 3s
blink 5
times
Off 3s
blink 6
times
Off 3s
blink 7
times
Off 3s
blink 10
times
Off 3s
blink 11
times
Off 3s
blink 13
times
Off 3s
blink 15
times
Off 3s
blink 17
times
Off 3s
blink 18
times
Off 3s
blink 19
times
System
abnormal
IPM protection
PFC prtection
Compressor
lose steps
Heating, anti-
high temp.
declines
Starts up fail
Compressor
current testing
circuit
malfunction
EEPROM
malfunction
Capacitor
charge
malfunction
Module sensor
circuit diagram
Module
temp.
over high
protection
Cooling, dehumidifying; compressor
stops running, indoor fan motor
works. Heating: all will stop running
Pls refer to troubleshooting
Cooling, dehumidifying; compressor
stops running, indoor fan motor
works. Heating: all will stop running
Cooling, dehumidifying; compressor
stops running, indoor fan motor
works. Heating: all will stop running
Pls refer to troubleshooting
Pls refer to troubleshooting
Cooling, dehumidifying; compressor
stops running, indoor fan motor
works. Heating: all will stop running
Cooling, dehumidifying; compressor
stops running, indoor fan motor
works. Heating: all will stop running
Cooling, dehumidifying; compressor
stops running, indoor fan motor
works. Heating: all will stop running
Cooling, dehumidifying; compressor
stops running, indoor fan motor
works. Heating: all will stop running
Cooling, dehumidifying; compressor
stops running, indoor fan motor
works. Heating: all will stop running
Cooling, dehumidifying; compressor
stops running, indoor fan motor
works. Heating: all will stop running
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
DC Bus
voltage dips
U3
off 3s
blink 20
times
cooling, dehumidifying; compressor
will stop, indoor fan motor works,
Heating: all will stop
Power voltage is not staable
cooling, dehumidifying; compressor
will stop, indoor fan motor works,
Heating: all will stop
1) Check the Input voltage if the
Voltage is lower than 150VAC,
restart the machine when the
power supply is normal
2) Checking the reactor L connection
off 3s
blink 21
times
PL
Low DC Bus
voltage
protection