Mitsubishi Electric MS-30SV-A1 Service Manual page 22

8-8. EMERGENCY-TEST OPERATION
When the remote controller is missing, has failed or the batteries run down, use 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 speed runs at Hi
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 MODE with a set temperature of 24°C.
The fan speed shifts to Me notch.
This operation continues until the EMERGENCY OPERATION switch is pressed once again or the unit receives any sig-
nal from the remote controller. In case of latter normal operation will start.
The coil frost prevention works even in this operation.
In the test run or emergency operation, the horizontal vane operates in VANE AUTO mode.
NOTE : Do not press the EMERGENCY OPERATION switch during normal operation.
8-9. LEV control
LEV (Expansion valve) control is controlled by "Thermostat ON" commands given from unit.
Controlled range
Drive speed
Opening set
Stop of indoor unit
Remote controller ON
Power ON (Breaker ON)
Approximate for 2 minutes since
compressor has started.
From approximate 2 minutes later
to approximate 13 minutes later
(for 11 minutes) since compressor
has started.
After 13 minutes passed since
compressor has started.
Thermostat OFF
Thermostat ON
Remote controller OFF
EMERGENCY OPERATION
switch
Minimum : 54 pulse, Maximum : 500 pulse
30 ~ 90 pulse / second
The opening is always set in opening direction.
(When closing LEV, open the LEV to adjust to set opening after closing the
LEV much once.)
Opening in stop : 150 pulse
after 3 minutes passed.
LEV positioning (LEV opening is closed completely once)
LEV is positioned. However, afterwards, LEV is not positioned at the first
remote controller ON.
Opening is set with the opening at starting.
(Opening at starting is set according to each operation modes and
outer temperature conditions.)
Opening is set with standard opening.
(Standard opening is set according to each operation modes and
outer temperature conditions.)
LEV opening is corrected to be once every 2 minutes so that discharge
temperature becomes the target discharge temperature.
(When the discharge temperature is lower than target one : LEV is corrected in
closed direction, when the discharge temperature is higher than target one :
LEV is corrected in opening direction.)
Opening in stop : 150 pulse
after about 3 minutes passed.
Same as the starting of compressor operation
Opening in stop : 150 pulse
completely at the speed of 4 pulse every 5 seconds in opening after about
3 minutes passed.
22
OPERATION INDICATOR lamp
Press once <Cool>
Press once again <Stop>
LEV is set that opening becomes 500 pulse
LEV is set that opening of starting
LEV is set so that the opening is opened