Misoperation Alarm Indicators (Only For Heat Pump Models) - Technibel CAV254R5TAA Installation Manual

4-8. Misoperation Alarm Indicators (only for heat pump models)

Alarm indicator lamps on the indoor unit indicate the error cause when the air conditioner fails to operate upon being switched
on. The possible alarm indications are given in the table below. Fig. 4-9 shows the location of the alarm lamps on the indoor
unit. .
Alarm
OPERATION TIMER
lamp lamp
G
G
G G
G
G
* S.C. : Serial communications
OPER. TIMER STDBY
OPERATION TIMER
lamp lamp
STANDBY
lamp
G
S.C. errors* between the indoor unit's controller (PCB) and the remote controller.
G
Compressor protector is working.
S.C. errors between indoor and outdoor units.
G
Indoor or aoutdoor thermistor is malfunctioning.
Outdoor unit protector is working.
Indoor unit protector is working.
TEST RUN switch on the operation controller is in ON state.
STANDBY Remote control
lamp receiver
Fig. 4-9
Cause of Trouble
NOTE
Stick the alarm message label supplied with the
wireless remote controller on the electrical
component box to find the cause of trouble in
case of need.
12
EG