2
(1) Pipe temperature code
During the test run, the pipe temperature code from 1 to 1 is displayed on the remote controller instead of room temper-
ature. The code should fall with the lapse of time in normal COOL operation, and should rise in normal HEAT operation.
(2) Trouble during test run
● If the unit malfunctions during the test run, refer to section 10 in this manual entitled “TROUBLESHOOTING.”
● When the optional program timer is connected to the conditioner, refer to its operating instructions.
2-6 Emergency operation
When the remote controller or microprocessor malfunctions but all other parts are normal, emergency operation is started
by setting the dip switch SW on the indoor controller board.
<Before emergency operation>
1. Make sure the compressor and the indoor fan are operating normally.
2. Locate the defect with the self-diagnostic function. When the self-diagnostic function indicates “protective function is
working”, release the protective function before starting the emergency operation.
CAUTION: When the self-diagnostic function indicates a check code of “P” (drain pump malfunction), DO NOT start the
emergency operation because the drain may overflow.
<How to operate>
1. For emergency cooling, set the dip switch SW-1 to ON and SW-2 to OFF.
For emergency heating, set the dip switch SW-1,2 to ON.
2. Turn ON the outdoor unit breaker and then ON the indoor unit breaker.
Emergency operation will now start.
. During emergency operation, the indoor fan operates on high speed, the auto vanes do not operate.
. To stop emergency operation, turn OFF the indoor unit breaker.
NOTE: The remote controller POWER ON/OFF button can not start/stop emergency operations.
CAUTION: Do not use emergency cooling for more than 10 hours, as the indoor coil may freeze.
Code
Pipe
temperature
Pipe
temperature
Thermistor
abnormality
Code
1
-40~2(1)°C
9
~45°C
2
3(2)~10°C
~15°C
~20°C
~25°C
~30°C
~90°C
~35°C
~40°C
10
11
12
13
14
15
~50°C
3
~55°C
4
~60°C
5
~70°C
6
7
8
1 ON
1
2
1.2 ON
1
2
1-2 OFF
1
2
SW3
Emergency
cooling
Emergency
heating
Normal
operation
Microprocessor board
OC229A
