Johnson Controls YVAHP0721CW Series, Service Manual

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SM-16007
4-39
MAINTENANCE
4.1.19 Removing Other Electrical Components
TURN OFF all power source switches.
NOTES:
1. Apply conductive heat transfer paste or silicon grease (Service Part No.: P22760) slightly over the contact
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2. Match the terminal numbers with the mark band numbers when reassembling. If incorrectly connected,
malfunction may occur or the electrical components may be damaged.
3. The U and V-Phases of the power source cables for inverter compressor (MC1) should be passed through
the current sensor (CTU and CTV) of the inverter module (PCB2) completely.
Connect the U-Phase of the power source cable with the U-Phase side (CTU), and the V-Phase with the
V-Phase side (CTV) of the current sensor. Not doing so may cause equipment malfunction or failure.
4. When securing PCBs or sheet metal for PCBs, protect the electric wiring from being caught on the sheet
metal or the electrical components.
5. Make sure to use screws, bushes and collars when securing PCBs for the inverter compressor.
Not doing so may cause equipment malfunction.
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An incorrect setting will cause a malfunction. Refer to the instruction manual attached with servicing the
PCB.
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PCB malfunction.
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An incorrect setting will cause a malfunction.