CEILING-CONCEALED
B-68
TROUBLESHOOTING
S series
CEILING-
CONCEALED
B.2.10 TROUBLESHOOTING
1. CAUTIONS ON TROUBLESHOOTING
(1) Before troubleshooting, check the followings:
1
Check the power supply voltage.
2
Check if the indoor/outdoor connecting wire is correct.
(2) Take care the followings during servicing.
1
Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn
off the breaker.
2
When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the
components.
3
When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
Lead wires
Housing point
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK
DAY
MONITOR/SET
CLOCK
ON/OFF
ERROR CODE
ERROR CODE
ERROR CODE
Turn on the power.
Press the [CHECK] button twice.
Set address with [TEMP] button if system control is used.
Press the [ON/OFF] button to stop the self-check.
CHECK button
Address
TEMP. button
IC : Indoor unit
OC: Outdoor unit
Check code
Unit No.
Timer ON/OFF button
<To cancel check code>
Display the error code on the self-check result display screen.
The address for self-check will blink when the
ON/OFF
button is pressed twice within three seconds.
– – – – : No trouble generated in the past.
F F F F : No corresponding unit.
Check code
Symptom
Remark
P1
Intake sensor error
P2
Pipe (TH2) sensor error
P9
Pipe (TH5) sensor error
E6,E7
Indoor/outdoor unit communication error
P4
Drain sensor error
P5
Drain pump error
P6
Freezing/Overheating protection operation
EE
Communication error between indoor and outdoor units
P8
Pipe temperature error
E0, E3~E5
Remote controller transmission error
E1, E2
Remote controller control board error
Fb
Indoor unit control system error (memory error, etc.)
E9
Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
UP
Compressor overcurrent interruption
U3,U4
Open/short of outdoor unit thermistors
UF
Compressor overcurrent interruption (When compressor locked)
U2
Abnormal high discharging temperature/49C worked/insufficient refrigerant
U1,Ud
Abnormal high pressure (63H worked)/Overheating protection operation
U5
Abnormal temperature of heat sink
U8
Outdoor unit fan protection stop
U6
Compressor overcurrent interruption/Abnormal of power module
U7
Abnormality of super heat due to low discharge temperature
U9,UH
Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit
/Current sensor error
Others
Other errors (Refer to the technical manual for the outdoor unit.)
For details, check the LED display
of the outdoor controller board.
As for outdoor unit, refer to
service manual.
• On wired remote controller.
Check code displayed in the LCD.
• For description of each check code, refer to the following table.