Test Run From Outdoor Unit Side - Hitachi FSG1 Series Technical Catalogue

17.4 TEST RUN FROM OUTDOOR UNIT SIDE

The procedure of test run from outdoor unit side is indicated
below. Setting of this DIP switch is available with the power
source ON.
Setting of Dip Switch (Before Shipment)
DSW4
Switch for Setting of Service Operation and Function
1. Test Run
2. COOL/HEAT Setting
(ON: Heating Operation)
ON
3. OFF (Fixed)
1 2 3 4 5 6
4. Manual Compressor OFF
5. OFF (Fixed)
6. OFF (Fixed)
Dip Switch Setting
É Setting of Operation Mode
Test Run
Cooling: Set DSW4-2 OFF.
ON
1 2 3 4 5 6
Heating: Set DSW4-2 ON.
ON
1 2 3 4 5 6
Ê 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
1 2 3 4 5 6
É Setting
Manual OFF
of Compressor
- Compressor Manual
OFF: Set DSW4-4 ON.
ON
1 2 3 4 5 6
- Compressor ON:
Set DSW4-4 OFF.
ON
1 2 3 4 5 6
É Manual Defrost Operation Starts
Manual
Defrost
Press PSW1 for more than 3 seconds
during heating operation, the defrost
operation is started after 2 minutes.
This function is not available within 5
minutes after starting heating operation
Ê Manual Defrost Operation Finishes
Defrost operation is automatically ended
and the heating operation is started.
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WARNING:
- Do not touch any other electrical parts when operating
switches on the PCB.
- Do not attach or detach service cover when the power
source for the outdoor unit is ON and the outdoor unit
is operated.
- Turn all DIP switches of DSW4 OFF when the test run
operation is completed.
Outdoor Unit Printed Circuit Board (PWB1)
Operation
É The indoor unit automatically start to
operate when the test run of the outdoor
unit is set.
Ê The ON/OFF operation can be performed
from the remote control switch or DSW4-1
of the outdoor unit.
Ë Continuous operation during 2 hours is
performed without Thermo-OFF.
É When DSW4-4 is ON during compressor
operation, the compressor stops to
operate immediately and the indoor unit is
under the condition of Thermo-OFF.
Ê When DSW4-4 is OFF, the compressor
starts to operate after the cancellation of
3-minutes guard.
É Defrost operation is available regardless
of frosting condition and total time of
heating operation.
Ê Defrost operation in not performed when
the temperature of outdoor heat
exchanger is higher than 10°C, high
pressure is higher than 2.0MPa
2
(20kgf/cm G) or Thermo-OFF.
TEST RUN
For Service
ON
OFF
DWS4
Remarks
§ Take care that the indoor units start
operation in accord 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 "TSET 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.
d 2 0
Time left (every 4 seconds)
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