Mitsubishi Electric MSZ-RW25VG Service Manual page 29

9-17. EMERGENCY/TEST OPERATION
In the case of test run operation or emergency operation, use the emer-
gency operation switch on the right side of the indoor unit. Emergency
operation is available when the remote controller is missing or has failed,
or when the batteries in the remote controller are running down. The unit
will start and OPERATION INDICATOR lamp will light up.
The first 30 minutes of operation is the test run operation. This opera-
tion is for servicing. The indoor fan runs at High speed and the tem-
perature control does not work.
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.
The coil frost prevention works even in the test run or the emergency
operation.
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 the latter case, normal operation will start.
NOTE: Do not press the emergency operation switch during normal
operation.
9-18. 3-MINUTE TIME DELAY OPERATION
When the system turns OFF, compressor will not restart for 3 minutes as 3-minute time delay function operates to protect
compressor from overload.
OBH902A
Operation mode
Set temperature
Fan speed
Horizontal vane
The operation mode is indicated by the Operation
Indicator lamp as following
Operation indicator lamp
29
COOL/HEAT
24°C
Med.
Auto
Emergency COOL
Emergency HEAT
Stop
Emergency
operation switch
(E.O. SW)