Service Manual

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TIMER is cancelled and the display of set time disappears.
8-10. 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, has failed, or when the batteries in the remote
controller 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
operation is for servicing. The indoor fan runs at High speed and
the temperature control does not work.
After 30 minutes of test run operation, the system shifts to
EMERGENCY COOL/HEAT(MSZ) MODE with a set temperature of
75°F (24°C). The fan speed shifts to Med.
All protective operations such as the coil frost prevention works
even in the test run or emergency operation.
In the test run or emergency operation, the horizontal vane oper-
ates 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.
8-11. 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.
8-12. Changing temperature indication (°F/°C)
• The preset unit is °F.
• °F → °C: Press RESET button while the temperature
buttons are pressed.
•
°C → °F: Press RESET button or remove the batteries
.
Press RESET button gently using
a thin instrument.
Operation mode COOL HEAT (MSZ)
Set temperature 75°F(24°C) 75°F(24°C)
Fan speed Med. Med.
Horizontal vane Auto Auto
The operation mode is indicated by the Operation
Indicator lamp as follows.
Lighted
Not lighted
MSZ
EMERGENCY
COOL
↓
EMERGENCY
HEAT
↓
STOP
MSY
EMERGENCY
COOL
↓
STOP
OBH732C