Commissioning - Hitachi RAS-8-FSNM Instruction Manual

COMMISSIONING

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DSW4: Refrigerant Cycle Number setting
Setting is required
Setting before shipment
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DSW5: End terminal resistance
No setting is required
Setting before shipment
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DSW6: Height difference
Setting is required
Setting before shipment
The indoor unit is located higher than outdoor
unit (20 to 30 m)
Fine-tuning of heating capacity
11 COMMISSIONING
When installation is completed, perform test run according to the
following procedure, and hand over the system to the customer.
Perform test run regarding indoor units one by one in order, and
confirm that the electrical wiring and the refrigerant piping are
correctly connected.
Start the indoor units one by one in order to confirm that they
are correctly numbered.
!
C A U T I O N
• Do not operate the system until all the check points have been
cleared.
a Check to ensure that the refrigerant piping and transmission
between outdoor unit and indoor units are connected to the same
refrigerant cycle. If not, it will cause an abnormal operation and a
serious accident.
b Check to ensure that the electrical resistance is more than 1
megohm, by measuring the resistance between ground and the
terminal of the electrical parts. If not, do not operate the system
until the electrical leakage is found and repaired.
c Check to ensure that the stop valves of the outdoor unit are fully
opened, and then start the system.
d Check to ensure that the switch on the main power source has
been ON for more than 12 hours, to warm the compressor oil by
the oil heater.
20 PMML0390B REV.0 - 11/2015 - P5416649
10.5.2 PCB2
(Setting for the ten digit)
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DSW1: (On PCB2)
No setting is required
When set Nº1 pin to ON, the electric current
detection is canceled. Nº 1 pin should be set
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JP1~6: Jumper cable
JP1
JP2
JP3
!
C A U T I O N
If the power source is open phase, "05" will be displayed at 7-segment on
the outdoor PCB, and the compressor will not be operated. In this case
check for the connection of power source terminal.
e Check that the refrigerant piping and the electrical wiring
conform to the same system, and check that the dip switch setting
of the refrigerant cycle Nº. (DSW4 & RSW1 [O.U.], DSW5 &
RSW2 [I.U.]) and the unit number (RSW) for the indoor units apply
to the system.
Confirm that the dip switch setting on the printed circuit board of
the indoor units and the outdoor units are correct. Especially, pay
attention to the setting of lift between indoor units and outdoor
unit, the refrigerant No. and the end terminal resistance.
f Check to ensure that the electrical resistance is more than 1
megohm, by measuring the resistance between ground and the
terminal of the electrical parts. If not, do not operate the system
until the electrical leakage is found and repaired. Do not apply the
voltage on the terminals for transmission 1 and 2.
g Check to ensure that each wire, L1, L2, L3 and N is correctly
connected at the power source.
If incorrectly connected, the unit will not operate and the remote
control switch will indicate the alarm code "05". In this case, check
and change the phase of the power source according to the
attached seat on the reverse side of the service cover.
h Check that the gas and liquid line stop valve are fully open.
Check the flare nuts are fully closed.
• FSNM series outdoor units does not operate within 4 hours after
power supply (Stoppage Code d1-22). In case of operating within 4
hours, release the protection control as follows:
1 Supply power to the outdoor unit and indoor units.
back to OFF after electrical work.
With jumper cable JP4
With jumper cable JP5
Without jumper cable JP6
Without jumper cable
With jumper cable
With jumper cable