Mitsubishi Heavy Industries FDTC40ZHXV Technical Manual page 326

E40
1. Applicable model
Model FDC 71 – 250
2. Error detection method
When the high pressure switch
63H1 is activated.
3. Condition of Error displayed
If 63H1 turns OFF (opened),
the compressor stops. After
3-minutes delay, the compressor
restarts. If this anomaly occurs
5 times within 60 minutes
or continues for 60 minutes
continuously.
4. Presumable cause
• Short circuit of air flow,
disturbance of air flow
and clogging filter at heat
exchanger (Condenser side)/
Breakdown of fan motor
• Defective outdoor control
PCB
• Defective 63H-1 connector
• Defective electronic
expansion valve connector
• Closed service valve
• Mixing of non-condensing gas
(nitrogen, etc.)
Note:
In the protective control range for compressor startup (initial startup after power ON), even if 63H1 is activated only once
(63H1turns OFF), immediately the error is displayed.
Keeps flashing Stays Off
Keeps flashing 1 time flash
5. Troubleshooting
Diagnosis
305
–
High pressure error (63H1 activated)
(Model FDC71 - 250)
–
Countermeasure
Open service valve.
Correct 63H1 connector.
Correct electronic
expansion valve connector.
Defective outdoor control
PCB Replace.
(Defective 63H1 input
circuit)