Service manual

Caution for Diagnosis SiENBE12-522A
198 Service Diagnosis
1. Caution for Diagnosis
1.1 Troubleshooting with Operation Lamp
The operation lamp flashes when any of the following errors is detected.
1. When a protection device of the indoor or outdoor unit is activated or when the thermistor
malfunctions, disabling equipment operation.
2. When a signal transmission error occurs between the indoor and outdoor units.
In either case, conduct the diagnostic procedure described in the following pages.
Location of
Operation Lamp
In case of In case of
FTK(X)S 20/25/35 D Series FTK(X)S 20/25/35 C Series
CTK(X)S 50 D Series ATXS 20/25/35 D Series
ATXS 20/25/35 C Series (grille type panel)
In case of
FTK(X)S 50/60/71 B Series
ATXS 50 D Series
ATXS 50 C Series (grille type panel)
In case of
FDK(X)S 25/35 C Series
CDK(X)S 50/60 C Series
In case of
FVK(X)S 25/35/50 B Series
In case of
FLK(X)S 25/35/50/60 B Series
(R4298)
ON/OFF
OPERATION lamp (green)
(R4297)
ON
OFF
Indicator lamps
Operation lamp (green)
Operation lamp (green)
HOME LEAVE lamp (red)
TIMER lamp (yellow)
ON/OFF switch
Air outlet
Indicator lamps
(R2837)
OPERATION lamp (green)
(Q0340)
ON
OFF
OPERATION lamp (green)
(Q0342)
OPERATION lamp (green)
(Q0341)