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10 Servicing
10.16 Removing other electrical components
N O T E
1
Lightly apply conductive silicone grease (Service Parts No.: P22760) on the contact surface of the fin when
replacing the components with the radiation fin such as the transistor module (IPM), diode module (DM) and
the fan controller (FANM).
2
Match the numbered terminals with the band marked with numbers when reassembling them. If they are
connected incorrectly, this may cause a malfunction and damage the electrical components.
3
The U and V phase of the power supply line in the Inverter compressor MC1 must pass completely through the
current sensor (CTU and CTV) of the inverter module (PCB2). Connect the U phase of the power supply line
with U phase side (CTU) and V phase with V phase side (CTV) of the current sensor. If this process is not carried
out, it may cause a malfunction or faults in the unit.
4
When fitting the PCBs or the sheet metal for PCB, protect the electrical wiring so it does not get caught on the
sheet metal or the electrical components.
5
Make sure to use screws, bushes and collars when fixing the PCB in the Inverter compressor. If you do not, it
may cause a malfunction in the unit.
6
When replacing the transmission PCB, set the Dip switches to be the same as for the PCB you have replaced.
If the Dip switches are incorrectly set, it will cause a malfunction in the unit. Refer to the instructions in the
manual attached with the servicing PCB.
7
Do not apply too much force to the electric components of the PCB or to the PCB itself. It may lead to PCB
failure.
8
When replacing the fan controller, set the Dip switches to be the same as for the fan controller you have
replaced. If the Dip switches are incorrectly set, it will cause a malfunction in the unit.
10.16.1 Removing the PCB1 and electrical components for the electrical box
D A N G E R
•
Turn OFF all the power source switches.
N O T E
•
For servicing use the following tools:
- Long-nose pliers.
- Phillips screw driver.
- Pliers.
Removing the PCB1
1
Remove all the connectors of the PCB1 -C- wiring.
2
Hold the central part -D- of the PCB1 fixing holder -A- (9 locations) with a long-nose pliers and pull outwards to remove
it.
Opening of the PCB1 fixing plate
1
Disconnect all the cables connected to the electrical components.
2
Remove the two screws -B-. The electrical components are available to check or replace them.
3
If the PCB1 fixing plate has been removed, all the connectors connected to the PCB1 should be removed.
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SMGB0065 rev. 1 - 12/2010
10
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Table of Contents
Troubleshooting
