Specifications

1083
FDC-HKXR
Does the
LD1 (Green) on the
inverter PCB
flash?
Is the
power supply
line normal?
Does the LD4
(red) on the inverter PCB
light?
(2)
Defective inverter PCB
Repair
• Defective inverter PCB
• Defective outdoor unit PCB
• Broken Cnl in No.5 (See next page)
- The outdoor unit PCB cannot receive signals.
- The inverter PCB cannot send signals.
- The watch dog signal cannot be taken.
NO
YES
YES
NO
NO
NO
Doesn't the number
of indoor unit connected exceed
the specified
value?
Repair
Power supply reset
YES
Defective indoor outdoor
unit PCB → Replacement
YES
NO
NO
(1)
Is it
normalized
Unit is normal
(malfunction by
accidental noise)
• Defective inverter PCB
• Defective outdoor unit PCB
The inverter PCB cannot receive signals
13
Red LED
Green LED
Stays OFF
Keeps flashing
Outdoor unit
Red LED
Green LED
9 time flash
Keeps flashing
Indoor unit
Notes (1) The maximum number of connect-
able unit of each model is as
follows: 9.
(2) Outdoor No. setting check for in-
door 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.
Notes (1) Make a check referring to Troubleshooting for Inverter (page 1090).
(2) When receiving fails, the LD4 comes on at once. If the outdoor unit cannot receive signals for 10 seconds, the 52C is turned OFF.
Accordingly, the ON state can be checked only in this period of 10 seconds.
Error display:
12
Red LED
Green LED
Stays OFF
Keeps flashing
Outdoor unit
Red LED
Green LED
7 time flash
Keeps flashing
Indoor unit
Error display:
[Excessive number of indoor units connected]
[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.