Table of Contents
TROUBLESHOOTING
1.4.2 Test Run Mode by Outdoor Unit
The procedure of test run from the outdoor unit side is indicated below. Setting of this dip switch is
available with the power source ON.
Setting of Dip Switch (Before Shipment)
Switch for Setting of Service Operation and Function
ON
1 2 3 4 5 6
OFF
G Do not touch any other electrical parts when operating switches on the PCB.
G Do not attach or detach service cover when the power source for the outdoor unit is ON and
the outdoor unit is operated.
G Turn all the dip switches of DSW4 OFF when the test run operation is completed.
Dip Switch Setting
1. Setting of Operation Mode
Cooling: Set DSW4-2 OFF.
ON
OFF
Heating: Set DSW4-2 ON.
ON
OFF
Test Run
2. Starting Test Run
Set DSW4-1 ON and the
operation is started after a
few~20 seconds.
When heating operation,
leave DSW4-2 at ON.
ON
OFF
1. Setting
* Compressor Manual
OFF: Set DSW4-4 ON.
ON
Manual OFF
OFF
of
Compressor
* Compressor ON:
Set DSW4-4 OFF.
ON
OFF
1. Manual Defrost Operation
Starts Press PSW1 for more
than 3 seconds during heating
operation, the defrost operation
is started after 2 minutes.
This function is not available
Manual
within 5 minutes after starting
Defrost
heating operation.
2. Manual Defrost Operation
Finishes Defrost operation is
automatically ended and the
heating operation is started.
1-126
DSW4
1. Test Run
2. COOL/HEAT Setting
(ON: Heating Operation)
3. OFF (Fixed)
4. Manual Compressor OFF
5. OFF (Fixed)
6. OFF (Fixed)
(In Case of 5 to 20HP)
Except No.1 Compressor
(In Case of 24 and 30HP)
1. The indoor unit automatically start
to operate when the test run of
the outdoor unit is set.
1 2 3 4 5 6
2. The ON/OFF operation can be
performed from the remote
control switch or DSW4-1 of
the outdoor unit.
3. Continuous operation during
1 2 3 4 5 6
2 hours is performed without
Thermo-OFF.
1 2 3 4 5 6
1. When DSW4-4 is ON during
compressor operation, the
compressor stops to operate
immediately and the indoor unit
1 2 3 4 5 6
is under the condition of
Thermo-OFF.
2. When DSW4-4 is OFF, the
compressor starts to operate
after the cancellation of 3-minutes
guard.
1 2 3 4 5 6
1. Defrost operation is available
regardless of frosting condition
and total time of heating operation.
2. Defrost operation in not performed
when the temperature of outdoor
heat exchanger is higher than
10
than 2.0MPa (20 kgf/cm
Thermo-OFF.
Operation
o
C, high pressure is higher
2
G) or
Outdoor Unit Printed Circuit Board
(PWB1)
For Service
DSW4
Remarks
# Take care that the indoor units operate
in accordance with the test run operation
of the outdoor unit.
# The test run is started from the outdoor
unit and stopped from the remote
control switch, the test run function of
the remote control switch is cancelled.
However, the test run function of the
outdoor unit is not cancelled.
# In case that the plural indoor units are
connected with one remote control
switch, all the units start test run
operation at the same time, therefore,
turn the power source OFF for the
indoor units not to operate test run.
In this case, the "TEST RUN" indication
of the remote control switch may flicker,
and this is not abnormal.
# The setting of DSW4 is not required
for the test run from the remote control
switch.
# Do not repeat compressor ON/OFF
frequently.
# Do not repeat defrost operation
frequently.
# When manual defrost operation is
accepted by PSW1, the time left before
starting defrost operation is indicated
at the 7-segment indicator on the PCB.
Time left (every 4 seconds)
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