Comp-Ipdu P.c. Board Replacement Procedure (Mcc-1647) - Toshiba MCY-MHP0404HT-C Service Manual

11-2.Comp-IPDU P.C. board replacement procedure
(MCC-1647: 43H69013)
1. Applicable models
MCY-MHP0404HT
MCY-MHP0404HT-C
MCY-MHP0404HT-A
MCY-MHP0404HT-E
MCY-MHP0404HT-ID
MCY-MHP0404HT-SG
MCY-MHP0404HT-TR
MCY-MHP0404HTJ
MCY-MHP0404HTJ-E
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-1647 (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 before starting the replacement procedure.
(3) Disconnect all the screws ④,screw ⑤ and screws ⑥ and 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) To remove the malfunctioning comp-IPDU P.C. board, remove the 2 card spacers ① and 2 single-touch
spacers ② first.
(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 a card spacer 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 the comp-IPDU P.C.
board to malfunction.)
(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. Then install the board in the outdoor control unit.
Failure to apply the silicone heat sink compound may cause the service P.C. board to malfunction.
(Tightening torque for screws ③ (M4x14) used to secure single-touch spacers ②: 1.2 ±0.1 N•m)
(7) When replacing the board, use the removed screws ④ (M4x8) , screws ⑤ (M4x15) and screws ⑥ (M3x20)
to connect the disconnected lead wires following the wiring diagram display panel. (Check that the wires
have been inserted correctly and securely to prevent connection errors.)
(8) If screws ④, screws ⑤ and screws ⑥ are not tightened sufficiently, the contact between the terminals
will deteriorate, possibly causing malf unctioning so pay attention when tightening the screws. However,
under no circumstances must power-driven screwdrivers or air screwdrivers be used when installing the
replacement P.C. board using such a device may damage the components. (Tightening torque: screw ④,
⑤ 1.2 ±0.1 N•m, screw ⑥ 0.55 ±0.1N•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-MHP0504HT
MCY-MHP0504HT-C
MCY-MHP0504HT-A
MCY-MHP0504HT-E
MCY-MHP0504HT-ID
MCY-MHP0504HT-SG
MCY-MHP0504HT-TR
MCY-MHP0504HTJ
MCY-MHP0504HTJ-E
Parts name
168
175
MCY-MHP0604HT
MCY-MHP0604HT-C
MCY-MHP0604HT-A
MCY-MHP0604HT-E
MCY-MHP0604HT-ID
MCY-MHP0604HT-SG
MCY-MHP0604HT-TR
MCY-MHP0604HTJ
MCY-MHP0604HTJ-E
Quantity
1
1
2