Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 1082

FDC-HKXR
8
Error display:
Indoor unit
Red LED Stays OFF
Green LED Keeps flashing
Is the
discharge gas thermistor
connector connection
OK?
NO
Repair
9
Error display:
Indoor unit
Red LED Stays OFF
Green LED Keeps flashing
Did 63H
Defective outdoor unit PCB →
Replacement (Defective 63H
input circuit)
Note (1) When the wire of 63H
If the operation is started in this period of time, the operation changes to the thermostat OFF state during cooing,
and cool wind blow stops during heating operation.
1080
[Defective discharge gas thermistor]
Outdoor unit
Red LED
Green LED
Are thr discharge
YES
gas thermistor characteristics
OK, is there no
broken wire?
Defective discharge gas
thermistor → Replacement
[63H, motion]
Outdoor unit
Red LED
Green LED
At 63H1 operation
1. During cooling
YES
, operate?
1
2. During heating
NO
,
1
3. During colling / heating
is broken from the moment of power on, the error E 40 is displayed 40 minutes later.
1
Keeps flashing
Keeps flashing
Defective outdoor unit PCB →
YES
Replacement (Defective dis-
charge gas thermistor input cir-
cuit)
NO
Temperature-resistance
characteristics of discharge
gas thermistor(Th
100
50
0
0 20
3 time flash
Keeps flashing
• Is the outdoor unit fan motor operating?
• Is there no short circuit air circulation for the outdoor
unit?
• Is there sufficient space for air inlet & outlet?
• Is the gas side service valve fully opened?
• Is the indoor unit heat exchanger thermistor detached
from the detector case?
• Is the filter clogged?
• Is the outdoor unit fan controlled by due to defective
63H ?
2
• Is the refrigerant charge excessive?
D)
O-
10
< =
T 80°C > =
T 80°C
5
0
50 80 100 120
Temperature [T] (°C)