Specifications

1084
FDC-HKXR
Power supply
detected between outdoor
unit terminal 5 ~PCB
faston terminal 6
(black)?
Defective 20 S
Replacement
Defective outdoor unit
PCB Replacement
Four way valve does not switch during heating operation
When communication is checked by the connector CnI, each value will be as follows.
CnI
1
2
3
4
5
6
7
Contents of communication
Common
12V power supply
Transmission from outdoor unit
Reception from outdoor unit
Watch dog (communication from inverter PCB to outdoor unit PCB)
Inverter overheat
Current cut
V(analog tester)
0V
12V
Swings at 11~11.5V
Swings at 4.5~5V
Swings at 2~4V
5V: normal
0V: abnormal
Connector
(d) How to advance checks for each faulty symptom
(i) Inspection method when there is no error display
1)
YES
NO
Are automatic
address and manual address
coexstent on the same
network
Repair to manual address
Defective outdoor unit
PCB Replacement
YES
NO
14
Red LED
Green LED
Stays OFF
Keeps flashing
Outdoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Indoor unit
Error display:
[Automatic address setting and manual address
setting coexstents in the same network]