Mitsubishi Electric MSZ-A09RV Service Manual page 32

9-8. EMERGENCY-TEST OPERATION
In case of test run operation or emergency operation, use the EMERGENCY OPERATION switch on the front of the
indoor unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of remote
controller run down. The unit will start and the POWER MONITOR lamp will light.
The first 30 minutes of operation is the test run operation. This operation is for servicing. The indoor fan speed runs at
High speed and the system is in continuous operation. (The thermostat is ON.)
After 30 minutes of test run operation the system shifts to EMERGENCY COOL/HEAT MODE with a set temperature of
24°C.
The fan speed shifts to Med. speed.
The coil frost prevention works even in emergency operation, and defrosting too.
In the test run or emergency operation, the horizontal vane operates in VANE AUTO mode.
Emergency operation continues until the EMERGENCY OPERATION switch is pressed once or twice or the unit receives
any signal from the remote controller. In case of latter normal operation will start.
NOTE : Do not press the EMERGENCY OPERATION switch during normal operation.
9-9. POWER MONITOR LAMP
Color of the lamp
RED
ORANGE
GREEN
The color of POWER MONITOR lamp is GREEN in any of the following cases.
• When ON-timer is standby
• In DRY operation
• In EMERGENCY operation
• When defrosting of the outdoor unit is being done in HEAT operation
EMERGENCY
OPERATION switch
Operating condition
The unit operates at high power.
The unit operates at middle power.
The unit operates with energy-saving.
Lighting lamp shows
the set temperature
Press once
< Cooling >
Press again
< Heating >
Press once again
< Stop >
Light up
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Blinking lamp shows
the room temperature
GREEN SIGN
21 22 23 24 25 26 27 28 29 30
GREEN SIGN
21 22 23 24 25 26 27 28 29 30
GREEN SIGN
21 22 23 24 25 26 27 28 29 30
Blinking light