Specifications

117
Error Code Meaning of error code and detection method Case Judgment and action
P9
Abnormality of pipe temperature ther-
mistor / Condenser-Evaporator (TH5)
1 The unit is in three-minute resume pro-
tection mode if short/open of thermistor
is detected. Abnormal if the unit is not
get back to normal within three minutes.
(The unit returns to normal operation, if
it has normally reset.)
2 Constantly detected during cooling, dry-
ing, and heating operation (except
defrosting)
Short: 90: or more
Open: -40: or less
1 Defective thermistor
characteristics
2 Contact failure of connector
(CN29) on the indoor controller
board. (Insert failure)
3 Breaking of wire or contact
failure of thermistor wiring
4 Temperature of thermistor is
90: or more or -40: or less
caused by defective refrigerant
circuit.
5 Defective indoor controller
board
1–3 Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2 Check contact failure of connector (CN29)
on the indoor controller board.
Refer to page 128 to 130.
Put the power on and check restart after
inserting connector again.
4 Operate in trial run mode and check pipe
<condenser- evaporator> temperature with
outdoor controller board. If pipe <condenser-
evaporator> temperature is exclusively low
(in cooling mode) or high (in heating mode),
refrigerant circuit may have defective.
5 Operate in trial run mode and check pipe
<condenser- evaporator> temperature with
outdoor controller board. If there is exclusive
difference with actual pipe <condenser-evap-
orator> temperature replace indoor controller
board
There is no abnormality if none of above
comes within the unit.
Put the power off and on again to operate.
Pipe <condenser-evaporator> temperature
display is indicated by setting SW2 of out-
door controller board as follows.
Outdoor controller board
SW2 setting
123
TH5 temperature display
Indoor unit No.1
456
123
Indoor unit No.2
456
123
Indoor unit No.3
456
123
Indoor unit No.4
456
E4
Remote controller signal receiving error
1 Abnomal if indoor controller board can
not receive normally any data from
remote controller or from other indoor
controller board for three minutes.
2 Indoor controller board can not receive
any signal from remote controller for two
minutes.
1 Check disconnection or looseness of indoor
unit or transmission wire of remote controller.
2 Set one of the remote controllers “main”.
If there is no problem with the action above.
3 Diagnose remote controllers.
a) When “RC OK” is displayed,
Remote controllers have no problem. Put
the power off, and on again to check. If
abnormality generates again, replace
indoor controller board.
b) When “RC NG” is displayed,
Replace remote controller.
c) When “RC E3” is displayed,
d) When “ERC 00-06” is displayed,
[c),d) ➜Noise may be causing abnormality.]
✽ If the unit is not normal after replacing
indoor controller board in group control,
indoor controller board of address “0”
may be abnormal.
E5
Remote controller transmitting error
1 Abnormal if indoor controller board can
not check the blank of transmission path
for three minutes.
2 Abnormal if indoor controller board can
not finish transmitting 30 times
consecutively.
12 Put the power off, and on again to check.
If abnormality generates again, replace
indoor controller board.
3 Check duplicate setting of refrigerant
address (outdoor controller board) SW1 (3 to
6).
1 Contact failure at transmission
wire of remote controller
2 All remote controllers are set
as “sub” remote controller. In
this case, E0 is displayed on
remote controller, and E4 is
displayed at outdoor LED.
3 Defective transmitting receiv-
ing circuit of remote controller
4 Defective transmitting receiv-
ing circuit of indoor controller
board
5 Noise has entered into the
transmission wire of remote
controller.
6 Remote controller is connect-
ed to the unit once, and
removed without power reset.
7 Wiring regulations are not
observed. Refer to (2) The
transmitting specification for
“A” control on page 59.
•Length of wires
•Number of remote controllers
•Diameter of wires
•Number of indoor units
1 Defective transmitting receiv-
ing circuit of indoor controller
board
2 Noise has entered into the
transmittion wire of remote
controller.
3 Duplicate setting of refrigerant
address
(In group control)
4 Remote controller is wired up
among indoor units (twin, triple
or quadro units).
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