Johnson Controls YVAHP072B31S, Service Manual

Page: 1501 / 1796

Service Manual
4-41
MAINTENANCE
TURN OFF all power source switches.
4.1.18.1 Removing PCB1 and Electrical Components for Electrical Box
NOTES:
1. Match the terminal numbers with the mark band numbers when reassembling. If incorrectly connected,
a malfunction may occur or the electrical components may be damaged.
2. Protect the cables from being caught on the plate edge or electrical components when closing the PCB
securing plate when reassembling.
3. The capacitor is charged with electricity even if the power source is turned OFF.
DO NOT come in contact with the terminals so as to avoid electrical shock. (
7
)
NOTES:
1. The open angle for the PCBs’ securing plate should be within 120 degrees. If trying to open wider than
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2. Do not touch the electrical components on the PCBs.
Do not bend or apply excessive force to a PCB. It will cause a PCB failure.
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(1) Remove all the connectors for wiring at PCB1.
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and pull it out to remove.
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(1) Remove all the wirings connected with the electrical components.
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replaced from the opening.
(3) If the securing plate for PCB1 is removed, all the connectors connected with PCB1 should be removed.
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(1) Remove all the wirings connected with the electrical components.
(2) Remove the screws securing electrical components.