Outdoor Unit: Abnormal Discharge Pipe Temperature - Panasonic Urban Multi MX1R Series Service Manual

PACD011001C2
3.18 Outdoor Unit:
F3 F3 F3 F3
Remote Controller
Display
„ Abnormal discharge pipe temperature
Supposed Causes
„ 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
∗ 1 Refer to Thermistor Resistance / Temperature Characteristics on P585
Note:
Troubleshooting Urban Multi "MX1R, ME1R Series" Using R-407C
Abnormal Discharge Pipe Temperature
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Discharge pipe
temperature is 135˚C
or higher.
NO
Are the
characteristics of the
discharge pipe thermistor
normal? R3T or R3-1T,
R3-2T
(See ∗1)
YES
CU-5
R3T R3-1T (inverter)
MX1R X17A
ME1R —
YES
Is there a
wrong connection
of the discharge pipe
YES
thermistor?
R3T or R3-1T (inverter side),
R3-2T (standard
side)
NO
Is there a wrong
YES
connection of the injection
solenoid valves Y3S
and Y4S?
NO
NO
CU-8·10
R3-2T (standard)
X17A X18A
X16A X17A
Troubleshooting
Connect correctly and turn on again.
Refrigerant shortage, compressor
defect, etc. Defect of the refrigerant
system.
Replace the discharge pipe thermistor.
Replace outdoor unit PC board A1P.
(VF044)
361