Panasonic CU-8ME1XPK - Outdoor Unit: Abnormal Discharge Pipe Temperature

PACD011001C2 Troubleshooting
Troubleshooting Urban Multi “MX1, ME1 Series” Using R-22 173
3.18 Outdoor Unit: Abnormal Discharge Pipe Temperature
Remote Controller
Display
F3
F3F3
F3
Supposed Causes
„
Abnormal discharge pipe temperature
„
Defect of discharge pipe thermistor (CU-5 : R3T CU-8·10 : R3-1T, R3-2T)
„
Defect of outdoor unit PC board
„
Discharge pipe thermistor wrong connection
„
Liquid injection solenoid valve wrong connection
Troubleshooting
Note:
(VF044)
Discharge pipe
temperature is 135˚C
or higher.
Is there a
wrong connection of the
injection solenoid valves
Y3S and Y4S?
Is there
a wrong
connection of the
discharge pipe thermistor?
R3T or R3-1T (inverter side),
R3-2T (standard
side)
Are the
characteristics
of the discharge pipe
thermistor normal?
R3T or R3-1T, R3-2T
(For the characteristics
table.)
Replace outdoor unit PC board A1P.
Connect correctly and turn on again.
Replace the discharge pipe thermistor.
NO
NO
NO
NO
Refrigerant shortage, compressor
defect, etc. Defect of the refrigerant
system.
YES
YES
YES
YES
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)
MX1 X17A X17A X18A
ME1 – X16A X17A