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11-2.Comp-IPDU P.C. board replacement procedure
(MCC-1664: 43H69029)
1. Applicable models
MCY-MHP0404HS8-E
MCY-MHP0404HS8J-E
MCY-MHP0404HS8-TR
MCY-MHP0404HS8J-TR
MCY-MHP0404HS8
MCY-MHP0404HS8J
MCY-MHP0404HS8-ID
MCY-MHP0404HS8-A
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-1664 (Comp-IPDU P.C. board) in Antistatic air cap
3
Card Spacer(No.①) in Plastic bag
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 then start the replacement procedure.
(3) Disconnect the screws ③, ④ and all connectors which are connected to the malfunctioning Comp-IPDU 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) Remove the malfunctioning Comp-IPDU P.C. board from the 2 card spacers ① and 2 single-touch spacers ②.
(Take care when removing the Comp-IPDU P.C. board not to damage the 2 card spacers ①. If a card spacer
① has been damaged, be sure to use card spacers ① packed with the board, and replace the damaged card
spacer by following the steps in the service guide. Failure to replace it may cause malfunction of the Comp-
IPDU P.C. board.)
(5) The screws and single-touch spacers ② which were removed will be used again when the service P.C. board
is installed so keep them in a safe place to ensure that they will not be lost or misplaced.
(6) When replacing the board, install the removed single-touch spacers ② on the service P.C. board, and evenly
apply silicone heat sink compound to the heat-sink surfaces of the IPM and rectifier devices on the service
P.C. board. Failure to apply the silicone heat sink compound may cause malfunction of the service P.C.
board.
(7) Use the removed screws ③ (M4x14) and screws ④ (M4x15) to install the service P.C. board and Heatsink in
the outdoor control unit. Connect the disconnected lead wires by following the wiring diagram display panel.
(Check that the wires have been inserted correctly and securely to prevent connection errors.)
(8) If screws ③ and screws ④ are not tightened sufficiently, the contact between the terminals will deteriorate,
possibly causing malfunctioning so pay attention when tightening the screws. However, power-driven
screwdrivers or air screwdrivers must not be used when installing the replacement P.C. board using such a
device may damage the components. (Tightening torque: screw ③, ④ 1.2 ±0.1 N•m)
(9) If any of the components on the P.C. board have been bent in the course of the replacing the board, rework
them so that they do not come into contact with the other components.
(10) Install the cover, turn on the power, and check operation.
MCY-MHP0504HS8-E
MCY-MHP0504HS8J-E
MCY-MHP0504HS8-TR
MCY-MHP0504HS8J-TR
MCY-MHP0504HS8
MCY-MHP0504HS8J
MCY-MHP0504HS8-ID
MCY-MHP0504HS8-A
Parts name
173
175
MCY-MHP0604HS8-E
MCY-MHP0604HS8J-E
MCY-MHP0604HS8-TR
MCY-MHP0604HS8J-TR
MCY-MHP0604HS8
MCY-MHP0604HS8J
MCY-MHP0604HS8-ID
MCY-MHP0604HS8-A
Quantity
1
1
2
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