Specifications

1078
FDC-HKXR
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
8 time flash
Keeps flashing
Outdoor unit
Is the unit
No. duplicated on
outdoor units?
Correction
YES
NO
Defective outdoor unit PCB
Replacement (Defective unit
No. read circuit)
Note (1) When the PCB is defective, the flash patterns of outdoor
unit red LED, green LED may become irregular.
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
2 time flash
(1)
Keeps flashing
Outdoor unit
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
5 time flash
(1)
Keeps flashing
Outdoor unit
52C secondary side L3
phase open?
Repair
YES
NO
Defective outdoor unit PCB
Replacement
(Defective CT circuit)
(1)
(2)
Notes (1) When voltage is detected at 52C primary side but not at the
secondary side, check also 52C (broken coil, poor contact).
(2) When voltage is detected at 52C primary side L
3 phase and
there is no error at 52C, the outdoor unit PCB (defective
52X
01
circuit or 52X
01
) or indoor unit PCB (defective
thermostat circuit) is defective.
Is the
discharge gas ther-
mistror characteristics
normal?
YES
NO
NO
Discharge pipe thermis-
tor replacement
Is the unit
normalized
Defective outdoor unit
PCB Replacement
(Defective discharge gas
thermistor input circuit)
Discharge gas
temperature error?
(At cooling/heating
operation)
Check the unit side.
Check the unit side.
• Insufficient refrigerant
Charge the refrigerant (measure)
• Is it the oveload operation?
Operable
Error stop
90ºC 130ºC
Discharge pipe temp.
• During cooling: Is FM0 operating?
• During heating: Is FM1 operating?
Are service valves (both liquid,
gas) fully opened during both
cooling and heating.
• Is the installation space of indoor/
outdoor unit adequate?
• Is there any short circuit air flow
for indoor/outdoor units?
3
Error display:
[Duplicated unit No. of outdoor units]
4
Error display:
[Open phase at L
3 phase of 52C secondary side (CM2)]
5
Error display:
[Discharge temperature error]