Service manual

Troubleshooting by Indication on the Remote Controller ESIE09-08A
182 Troubleshooting
3.31 “J7 ” Outdoor Unit: Malfunction of Thermistor (R7T) for
Outdoor Unit Liquid Pipe
Remote Control
Display
J7
Applicable Models ER*Q 011~016*
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by the liquid pipe thermistor.
Malfunction
Decision Conditions
When a short circuit or an open circuit in the heat exchange thermistor is detected.
Supposed Causes  Defect of thermistor (R7T) for outdoor unit liquid pipe
 Defect of outdoor unit PC board (A1P)
Troubleshooting
 Refer to thermistor resistance / temperature characteristics table on P251.
(V3074)
Caution
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
NO
NO
Replace the thermistor (R7T).
YE S
YE S
Connect the thermistor and turn on again.
Connector
is connected
to X13A of outdoor unit
PC board (A1P)
Resistance
is normal when
measured after
disconnecting the thermistor
(R7T) from the outdoor
unit PC board.
(3.5kW~360kW)
Replace outdoor unit PC board (A1P).