Panasonic CU-8ME1XPK - Outdoor Unit: Malfunction of Thermistor (R4 T) for Suction Pipe

Troubleshooting PACD011001C2
518 Troubleshooting UM Combination “MA1R Series” Using R-407C
3.21 Outdoor Unit: Malfunction of Thermistor (R4T) for Suction Pipe
Remote Controller
Display
J5
Supposed Causes
„
Defect of thermistor (R4-1(11)T, R4-2(12)T or R4-13T) for outdoor unit suction pipe
„
Defect of outdoor unit PC board (A1P)
Troubleshooting
The alarm indicator is displayed when the fan is being used also.
Note:
16~20HP class ··· R4-1T, R4-2T (A1P)
24~30HP class ··· R4-11T, R4-12T (A1P), R4-13T (A3P)
(VF047)
Resistance
is normal when
measured after
disconnecting the thermistor
(R4-1(11)T, R4-2(12)T or
R4-13T) from the indoor
unit PC board.
(3.5kΩ ~
360kΩ)
Replace outdoor unit PC board A1P or
A3P.
Connect the thermistor and turn on
again.
NO
NO
Replace the thermistor (R4-1(11)T, R4-
2(12)T or R4-13T).
YES
YES
Connector
is connected to X14A,
X15A or X20A ofoutdoor unit
PC board(A1P
or A3P).
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.