Mitsubishi Electric MCFH-13NV-E3 Service Manual page 24

9-7. EMERGENCY-TEST OPERATION
When the remote controller is missing, has failed or the batteries run down, press the EMERGENCY OPERATION
switch on the front of the indoor unit. The unit will start and the OPERATION INDICATOR lamp will light.
The first 30 minutes of operation is the test run operation. This operation is for servicing. The indoor fan runs at high
notch and the system is in continuous operation. (The thermostat is ON)
After 30 minutes of test run operation the system shifts to EMERGENCY COOL or HEAT MODE with a set temperature
of 24˚C. The fan shifts to Me notch.
This operation continues until the EMERGENCY OPERATION switch is pressed again or the unit receives any signal
from the remote controller. In case of latter normal operation will start.
The coil frost prevention works even in this operation, and defrosting too.
In the test run or emergency operation, the horizontal vane operates in AUTO mode.
NOTE : Do not press the EMERGENCY OPERATION switch during normal operation.
EMERGENCY
OPERATION switch
9-8. AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed
are memorized by the the auto restart P.C. board.
The "AUTO RESTART FUNCTION" sets to work the moment the power has restored after power failure. Then, the unit
will restart automatically. However if the unit is operated in "I FEEL CONTROL" mode before power failure, the operation
is not memorized. In "I FEEL CONTROL mode", the operation is decided by the initial room temperature.
NOTE :
•The operation settings are memorized when 10 seconds have passed after the remote controller was operated.
•If the main power is turned off or a power failure occurs while AUTO START/ STOP timer is active, the timer setting is
cancelled.
•If the unit has been off with the remote controller before power failure, the auto restart function does not work as the
power button of the remote controller is off.
•To prevent breaker off due to the rush of starting current, systematize other home appliances not to turn on at the same
time.
•
When some air conditioners are connected to the same supply system, if they are operated before power failure, the
starting current of all the compressors may flow simultaneously at restart.
Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current
by adding to the system that allows the units to start one by one.
Press once <Cool>
Press again <Heat>
Press once again <Stop>
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OPERATION INDICATOR lamp