Hitachi YUTAKI S Serie Manuel D'installation page 36

13.2. 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)
DSW1
Switch for Setting of Service Operation and Function
1. Test Run
2. COOL/HEAT
Setting (ON: Heat Operation)
3. OFF (Fixed)
4. Manual Compressor OFF
Operation Dip Switch Setting
 Setting of Operation Mode:
Cooling: Set DSW1-4 OFF.
Heating: Set DSW1-2 ON.
 Starting Test Run:
In cooling operation set DSW1-1 ON
Test Run
and the operation is started after a
few ~20 seconds.
When heating operation, leave
DSW1-2 at ON
↓
Test Run Heating:
 Setting:
Compressor Manual OFF:
Set DSW1-4 ON.
Manual
OFF of
Compressor ON:
Compressor
Set DSW1-4 OFF.
 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
Manual
available within 5 minutes after
Defrost
starting heating operation
 Manual Defrost Operation Finishes
Defrost operation is automatically
ended and the heating operation is
started.
38
PMML0215A rev.1 - 02/2012

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 DSW1 OFF when the test run operation
−
is completed.
Operation
 The indoor unit automatically start
to operate when the test run of
the outdoor unit is set.
 The ON/OFF operation can
be performed from the remote
control switch or DSW1-1 of the
outdoor unit.
 Continuous operation during
2 hours is performed without
Thermo-OFF.

NOTE:
TEST RUN operation time can
be increased depressing the time
switch in the Remote Control.
 When DSW1-4 is ON during
compressor operation, the
compressor stops to operate
immediately and the indoor unit
is under the condition of Thermo-
OFF.
 When DSW1-4 is OFF, the
compressor starts to operate after
the cancellation of 3-minutes
guard.
 Defrost operation is available
regardless of frosting condition
and total time of heating
operation.
 Defrost operation in not
performed when the temperature
of outdoor heat exchanger is
higher than 10°C, high pressure is
higher than 3.3 MPa (33kgf/cm
or Thermo-OFF.
TEST RUNNING
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 "TEST RUN" indication of
the remote control switch may flicker,
and this is not abnormal.
■ The setting of DSW1 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.
G)
2