OB274-30
Press once <Cool>
Press once again <Stop>
• The following indication applies regardless
of shape of the indicator.
EMERGENCY OPERATION switch
EMERGENCY OPERATION switch
OPERATION INDICATOR lamp
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 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
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 MODE with a set temperature of 75˚F.
The fan speed shifts to Med. speed.
The coil frost prevention works even in 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 again or the unit receives any sig-
nal from the remote controller. In case of latter normal operation will start.
NOTE : Do not press the EMERGENCY OPERATION switch during normal operation.
MS09TW
MS12TN
MS15TN
MS17TN
