Operation Lock; Emergency/Test Operation - Mitsubishi Electric MSZ-LN18VG2W-E1 Service Manual

9-14. OPERATION LOCK

This function locks operation mode only. Other functions, such as OFF/ON, temperature setting, or airflow direction
adjustment, are available.
(1) Hold down button and
OPERATION LOCK.
The icon for the locked operation mode blinks.
(2) Hold down button and
able OPERATION LOCK.
• The icon for the locked operation mode blinks when
able OPERATION LOCK or
• AIR PURIFYING operation is not available when OPERATION LOCK is enabled in a mode other than FAN mode.
9-15. CIRCULATOR OPERATION
In case the indoor temperature reaches the setting temperature, the outdoor unit stops and the indoor unit starts FAN oper-
ation to circulate the indoor air.
The setting of fan speed and airflow direction can be changed.
The outdoor unit starts operation automatically when the indoor temperature drops below the setting temperature.
(1) Press CIRCULATOR button during HEAT mode to enable CIRCULATOR operation.
The unit performs FAN operation in case the indoor temperature reaches the setting temperature.
(2) Set the fan speed and airflow direction.
• The setting of fan speed and airflow direction is common for HEAT and CIRCULATOR operation.
• Ventilation starts at Low fan speed in case AUTO fan speed is selected.
(3) Press CIRCULATOR button again to cancel CIRCULATOR operation.
NOTE:
CIRCULATOR operation doesn't work in the following situation.
• AUTO mode (Auto change over) is selected.
• Defrosting is being done.
• Indoor unit is connected to multi type outdoor unit.
Although received sound will be heard from the indoor unit and mark is displayed on remote controller when is
pushed, CIRCULATOR operation doesn't work in multi connection.
• FAN operation may make you feel cold wind.
Reduce the FAN speed or adjust the airflow direction to avoid the wind.

9-16. EMERGENCY/TEST OPERATION

In the case of test run operation or emergency operation, use
EMERGENCY 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 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 EMERGENCY OPERATION switch during normal
operation.
9-17. 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.
OBH766C
button simultaneously for 2 seconds while the unit is not operating to enable
button simultaneously for 2 seconds again while the unit is not operating to dis-
button and
button is pressed during operation while OPERATION LOCK is enabled.
26
button are held down to enable or dis-
Operation mode COOL/HEAT
Set temperature 24°C
Fan speed Med.
Horizontal vane Auto
The operation mode is indicated by the Operation
Indicator lamp as following
Operation Indicator lamp
EMERGENCY COOL
↓
EMERGENCY HEAT
↓
STOP
Emergency
operation switch
(E.O. SW)
Lit
Not lit