High Pressure Error; Failure To Open The Service Valve - Mitsubishi FDC 6 Series Service Manual

9
High pressure error [63H
Outdoor unit
Red LED 4 time flashes
Green LED 1 time flash
Did 63H operate?
1
NO
Defective outdoor unit PCB
Replacement (Defective 63H ,
1
input circuit)
63H1, 49C operation (Only case of FDC808, 1008 type)
Outdoor unit
4 time flashes
Red LED
1 time flash
Green LED
Did 63H
Defective outdoor unit PCB
Replacement (Defective 63H
input circuit)
10

Failure to open the service valve

Outdoor unit
5 time flashes
Red LED
1 time flash
Green LED
This abnormality will be indicated only when the compressor is ON for the time after turning on the power. (Refer to page 331)
31
] (Only case of FDCP208~508 type)
1
At 63H1 opration
• Is the outdoor unit fan motor operating?
• Is there no shortcircuit in the outdoor unit?
YES
• Is sufficient space reserved for suction or discharge?
• Is not the refrigerant charge excessive?
At 63H
1. During cooling
YES
• Is the outdoor unit fan motor operating?
,operate?
1
• Is there no short circuit air circulation for thr outdoor
• Is there sufficient space for air inlet & outlet?
2. During heating
NO
• Is the gas side service valve fully opened?
• Is the indoor unit heat exchanger sensor detached
,
• Is the filter clogged?
1
• Is the outdoor unit fan controlled by due to defective
3. During colling/heating
• Is the refrigerant charge excessive?
At 49C operation
During cooling/heating
• Isn't there insufficient refrigerant?
• Isn't there a missing phase (
operation
1
unit?
from the detector case?
63H ?
2
(Isn't there gas leakage?)
or
L L
1
phase)?
2