ESIE13-02
Error Codes: Outdoor Units
137
Part 4 – Troubleshooting
4
3
4
5
4
4.18
“P4”
Malfunction of Radiator Fin Temperature Thermistor
Remote controller
display
P4
Method of
malfunction
detection
Detection by open or short circuit of the radiator fin temperature thermistor during the compressor
stops operating.
Malfunction
decision conditions
When open or short circuit of the radiator fin temperature thermistor is detected during the compressor
stops operating
Supposed causes
Faulty radiator fin temperature thermistor
Faulty outdoor unit PC board
Troubleshooting
(*) See also "Check No.4 - Resistance Conversion Table (Ambient, Coil, Fin)" on page 153.
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Disconnect the connector
from X111A on inverter PC
board, then check the
thermistor resistance at the
ordinary temperature.
Normal?
(*)
Check LED on the
outdoor unit PC board.
Reset
Does the radiator
fin temperature thermistor
malfunction?
Is reset possible?
YES
NO
YES
NO
NO
YES
Probe other factors than the malfunction.
* Replace the inverter PC board (A2P) ERHQ***W1* / ERLQ***W1*
* Replace the outdoor PC board (A1P) ERHQ***V3* / ERLQ***V3*
* Replace the outdoor PC board (A1P) ERHQ***V3* / ERLQ***V3*
* Replace the inverter PC board (A2P) ERHQ***W1* / ERLQ***W1*
