Panasonic CU-8ME1XPK - Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3 T)

PACD011001C2 Troubleshooting
Troubleshooting Urban Multi “MX1R, ME1R Series” Using R-407C 363
3.20 Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3T)
Remote Controller
Display
J3
J3J3
J3
Supposed Causes
„
Defect of thermistor (CU-5: R3T, CU-8·10: R3-1T, R3-2T) for outdoor unit discharge pipe
„
Defect of outdoor unit PC board (A1P)
Troubleshooting
The alarm indicator is displayed when the fan is being used also.
Note:
(VF046)
Resistance
is normal when
measured after
disconnecting the thermistor
(R3T or R3-1T, R3-2T) from
the indoor unit PC
board. (3.5kΩ~
400kΩ)
Replace outdoor unit PC board A1P.
Connect the thermistor and turn on
again.
NO
NO
Replace the thermistor (R3T or R3-1T,
R3-2T).
YES
YES
Connector is
connected to X17A (18)
or X16A (17) of outdoor unit
PC board (A1P).
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
CU-5 CU-8·10
R3T R3-1T (inverter) R3-2T (standard)
MX1R X17A X17A X18A
ME1R — X16A X17A