Mitsubishi Heavy Industries SRRM40HENG-L, Handbook, Page: 1082 / 1106

1080
FDC-HKXR
9
Red LED
Green LED
Stays OFF
Keeps flashing
Outdoor unit
Red LED
Green LED
3 time flash
Keeps flashing
Indoor unit
Note (1) When the wire of 63H
1
is broken from the moment of power on, the error E 40 is displayed 40 minutes later.
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.
Error display:
[63H, motion]
8
Red LED
Green LED
Stays OFF
Keeps flashing
Outdoor unit
Red LED
Green LED
Keeps flashing
Keeps flashing
Indoor unit
Error display: [Defective discharge gas thermistor]
1. During cooling
• 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?
2. During heating
• 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
?
3. During colling / heating
• Is the refrigerant charge excessive?
YES
Did 63H
1
, operate?
NO
Is the
discharge gas thermistor
connector connection
OK?
Repair
NO
Are thr discharge
gas thermistor characteristics
OK, is there no
broken wire?
Defective discharge gas
thermistor
→
Replacement
YES YES
NO
Defective outdoor unit PCB
→
Replacement (Defective dis-
charge gas thermistor input cir-
cuit)
Defective outdoor unit PCB
→
Replacement (Defective 63H
1
,
input circuit)
At 63H1 operation
T 80
°
C
>
=
T 80
°
C
<
=
5
10
0
120 100 80 50 20
Temperature [T] (
°
C)
0
0
50
100
Thremistor resistance (k
Ω
) [T 80
°
C]
> =
Thremistor resistance (k
Ω
) [T 80
°
C]
< =
Temperature-resistance
characteristics of discharge
gas thermistor(Th
O-
D)