Specifications

272
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
• Communication checked at the CnI, will show hte following values.
CnI
1
2
3
4
5
6
7
Detail of communication
Common
12V power supply
Transmission from inverter
Reception from inverter
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 or remort controller
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 and manual address or remote controller
address coexstents in the same network]