Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 929

Error display : e43
15
Indoor unit
Red LED Stays OFF
Green LED Keeps flashing
Doesn't the number
of indoor unit connected
exceed the specified
value?
Power supply reset
Is it
normalized
Unit is normal
(malfunction by
accidental noise)
e45
Error display :
16
Indoor unit
Red LED Stays OFF
Green LED Keeps flashing
• Defective inverter PCB
• Defective outdoor unit PCB
The inverter PCB cannot receive signals
Notes (1) Make a check referring to Troubleshooting for Inverter (page 933.)
(2) When receiving fails, the LED
Accordingly, the ON state can be checked only in this period of 10 seconds.
[Excessive number of indoor units connected]
Outdoor unit
Red LED
Green LED
(1)
YES
NO
YES
Defective indoor outdoor
unit PCB Replacement
NO
[Transmission error between inverter and Outdoor unit PCB]
Check that the 52C is ON. With the 52C ON, power is supplied to the inverter PCB.
Outdoor unit
Red LED
Green LED
Does the
LED (Green) on the
1
inverter PCB
blink?
YES
YES Does the LED
2
(red) on the inverter PCB
(2)
blink?
NO
• Defective inverter PCB
• Defective outdoor unit PCB
• Broken Cnl in No.5 (See next page)
- The ourdoor unit PCB cannot receive signals.
- The inberter PCB cannot send signals.
- The watch dog signal cannot be taken.
comes on at once. If the outdoor unit cannot receive signals for 10 seconds, the 52C is turned OFF.
2
1 time flash
Keeps flashing
Repair
1 time flash
Keeps flashing
NO Is the
power supply
line normal?
NO
Repair
FDC-HKX
Notes (1) The maximum number of connectable
units of each model is as follows :
FDC140 type : 10, FDC224, 280 type
16.
(2) Outdoor No. setting check for indoor
units (to see if outdoor No. is of other
system)
(3) In case of auto addressing erase the
addresses stored in memory and
perform re-setting
YES
Defective inverter PCB
927