Hitachi UTOPIA RAS-4HVRP2E - Page 149

7 Commissioning
Test run using the PC-ARFP1E remote control switch (example)
SMGB0136 rev.0 - 07/2021
147
7
Step 3
Checking procedure for abnormalities
Remote control
switch indication
Fault Inspection points after the power source OFF
No indication
The power source is not turned ON
The connection of the remote control cable is incorrect
1. Connection between Connector and Wires
2. Connecting Points of Remote Control Cable
3. Contact of Connectors of Remote Control Cable
The connecting wires of power supply line are incorrect or
loosened
4. Connection Order of each Terminal Board
5. Screw Fastening of each Terminal Board
Counting number of
connected units is
incorrect.
The electrical wiring between indoor unit and outdoor unit is
disconnected, or the power source is not turned ON.
The setting of unit number is incorrect.
6. RSW Setting on Indoor Unit Printed Circuit
Board
The connection of control cables between each indoor unit
are incorrect. (When one remote control switch controls
multiple units.)
7. Wire Connecting Order of Bridge Cable
8. Connecting Points of Bridge Cable
9. Contact of Connectors of Bridge Cable
After checking procedure back to Step 1.
Step 4
Pressandhold“RUN/STOP”switch.
• Normal (there is not an abnormality):
Thetestrunoperationwillbestarted.Theoperationmode,theairowvolume,theairowdirectionandthetestrun
timecanbesetonthetestrunscreen.Selecttheitembypressing“▲▼◄►”.
Thedefaultsettingofthetestruntimeis2-hoursOFFtimer.Theindoortemperatureshallbe21°CDB/15°CWBor
higher and outdoor temperature shall be -5°CDB (-15°C in case of simulatenous operation) or higher for the cooling
operation.
The indoor temperature shall be 27°CDB or lower for the heating operation.
The cooling operation is not performed if the outdoor temperature is below -5°CDB (-15°C in case of simulatenous
operation).
The temperature detections by the thermistors are invalid through the protection device are valid during test run.
Remove the abnormality according to the table below and perform test run again.
Thetestrunwillbenishedbypressing“RETURN”switchduringthestoppageor“RUN/STOP”switchduringthe
operation.
• Abnormal (there is an abnormality):
Iftheunitsdonotstartortheoperationlampontheremotecontrolswitchashes,thereisanabnormality.
Do the following checking procedure for abnormalities (Step 5).
Step 5
Checking procedure for abnormalities
Remote control switch
indication
Unit condition Fault
Inspection points after the power source
OFF
Theoperationlampashes.
(1time/1sec.)andtheUnit
No.and Alarm Code “03”
ash.
The unit does not
start.
The power source is not turned ON. -
The connecting wires of operating
line are incorrect or loosened.
1. Connecting Order of each Terminal Board.
The fuse on the PCB may be blown out due
to miswiring. (Can be recovered only once by
the DSW on the PCB). (*)
2. Screw fastening of each terminal board.
3. Connecting order of power line between
indoor units and outdoor unit.
Theoperationlampashes.
(1time/2sec.)
The unit does not
start.
The connection of remote control
cable is incorrect.
Other alarm codes or
indications than those
above (Refer to the alarm
code table.)
The unit does not
start, or starts once
and then stops.
The connection of the thermistors
or other connectors are incorrect.
Tripping of protector exists, or else.
Check the unit by the alarm code table in
the service manual (by authorized service
persons only).
Theoperationlampashes.
(1time/1sec.)AndtheUnit
No.00. Alarm Code dd and
UnitCodeE.00ash.
The unit does not
start.
The connecting wires of operating
line are incorrect or loosened.
Check the unit by the alarm code table in
the service manual (by authorized service
persons only).