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11
P.C. board exchange procedures
11-1.Interface P.C. board replacement procedure
(MCC-1639: 43H69023)
This same service P.C. board is installed in different models at the shipment stage. If the P.C. board assembly is
to be replaced, check what appears on the inspection display (7-segment display), enter this on the replacement
record table, and then follow the replacement steps below to ensure that the assembly is replaced correctly for
the model concerned.
Please return to us P.C.board with the replacement record table attached,After P.C.board replaced.
1. Applicable models
MCY-MHP0305HT
MCY-MHP0305HT-C
MCY-MHP0305HT-ID
MCY-MHP0305HT-CF
2. Shipped parts list
Please make sure that before you do the work, the following parts are shipped all.
No
1
P.C.board Replacement Procedure Manual (English and Chinese each 1page A4 paper double side print.)
2
Service P.C.board MCC-1639 (Interface P.C.board) in Antistatic air cap
3. Replacement steps
(1) Turn off the power of the outdoor control unit. (Turn off the power of the outdoor unit.)
(2) Immediately after turning off the power of the outdoor unit, the electrolytic capacitors inside the unit will still
have a high voltage, and there is a risk of electric shocks. Therefore, wait at least 5 minutes after turning off
the power before starting the replacement procedure.
(3) Disconnect all the connectors which are connected to the interface P.C. board.
(Since the connectors may be damaged if they are pulled out by grasping their lead wires, be sure to take
hold of the connectors themselves when disconnecting them.)
(4) To remove the malfunctioning interface P.C. board, remove the eight card edge spacers ① fi rst.
MCY-MHP0405HT
MCY-MHP0405HT-C
MCY-MHP0405HT-ID
MCY-MHP0405HT-CF
Parts name
152
174
MCY-MHP0505HT-C
MCY-MHP0505HT-CF
Quantity
1
1
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