Test Run Procedure From The Outdoor Unit Side - Hitachi RAS-2-HVNP Service Manual

7. Test run

7.5 Test run procedure from the outdoor unit side

The test run procedure from the outdoor unit side is shown below.
You can set this DIP switch while the power source is ON.
Setting of dip switch
1 Test Run
2 COOL/HEAT
3 COOL / HEAT intermediate season
4 Manual Compressor stop
D A N G E R
• Do not touch any other electrical components while you are setting the switches on the PCB.
• Do not attach or detach the service access panel when the power source for the outdoor unit is ON and the
outdoor unit is operating.
• Set all the DIP switches of DSW1 to OFF after completing the test run.
Operation Dip Switch Setting
 Setting of Operation Mode:
Cooling: Set DSW1-2 OFF.
Heating: Set DSW1-2 ON.
Test Run
 Starting Test Run:
Set DSW1-1 ON and the ope-
ration is started after a few ~20
seconds.
Cooling
 Setting:
Compressor Manual OFF:
Set DSW1-4 ON.
Manual
OFF of
Compressor
Compressor ON:
Set DSW1-4 OFF.
177
SMGB0079 rev.0 - 01/2013
DSW1
(Setting ON: Heat Operation)
 The indoor unit automatically start to
operate when the test run of the outdoor
unit is set.
 The ON/OFF operation can be per-
formed from the remote control switch or
DSW1-1 of the outdoor unit.
 Continuous operation during 2 hours
is performed without Thermo-OFF.
N O T E
•
TEST RUN operation time can be
increased depressing the time
switch in the Remote Control.
•
If is setting DSW1-3 ON, cooling/
heating
Heating
mode is activaded.
 When DSW1-4 is ON during com-
pressor operation, the compressor stops
to operate immediately and the indoor
unit is under the condition of Thermo-
OFF.
 When DSW1-4 is OFF, the com-
pressor starts to operate after the can-
cellation of 3-minutes guard.
Operation
•
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 outdo-
or unit and stopped from the remote
control switch, the test run function
of the remote control switch is cance-
lled. However, the test run function of
the outdoor unit is not cancelled
•
In case that the plural indoor units
are connected with one remote con-
trol switch, all the units start test run
operation at the same time, therefore,
turn the power source OFF for the in-
door units not to operate test run. In
this case, the "TEST RUN" indication
of the remote control switch may flic-
ker, and this is not abnormal.
intermediate season
•
The setting of DSW1 is not required
for the test run from the remote con-
trol switch.
•
Do not repeat compressor ON/OFF
frequently.
Remarks
7