NOTE
• In case of 4-way air discharge type, test run operations is
not possible without the ceiling panel installation.
• During the test run, all of the 3 indicator lamps on the indoor
unit will flash.
• During the test run, the air conditioner runs continuously
and the thermostat does not control the system.
• To protect the air conditioner from overloading, the outdoor
unit will not start running for 3 minutes after power is applied
or the air conditioner is turned off and then back on.
• When the air conditioner fails to start the test run, 1 or more
of the 3 alarm indicator lamps on the indoor unit will flash
(See next section - Heat pump models only).
5-5. Test Run Switch
Test run switch is located at operating control unit. See Fig. 5-6.
Regarding the test run, please refer to the Installation
Instructions provided with the outdoor unit.
Fig. 5-6
SERVICING
switches
All OFF for initial settings
1. TEST RUN (ON)
2. PCB CHK. (N)
3. RCU MAIN (OFF)
/ SUB (ON)
4. OFF
ADDRESS
NORM. HOLD
SWEEP
ON • l
OFF • O
ON
OFF
ADDRESS
switch
NORM./
HOLD
switch
SWEEP
button
ON/OFF
operation
button
10
5-6. 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. 5-7 shows the location of the alarm lamps on the indoor
unit. .
Alarm
Cause of Trouble
OPERATION
TIMER
STANDBY
lamp
lamp
lamp
●
●
S.C. errors* between the indoor unit’s controller (PCB) and the remote controller.
●
●
Compressor protector is working.
●
●
S.C. errors between indoor and outdoor units.
●
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.
* S.C. : Serial communications
Fig. 5-7
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.
OPERATION
TIMER
STANDBY
Remote control
lamp
lamp
lamp
receiver
OPER.
TIMER STDBY
EG
