Disassembly Instructions - Mitsubishi Electric MXZ-18TV Service Manual

13

DISASSEMBLY INSTRUCTIONS

MXZ-18TV -
E1
OUTDOOR UNIT
OPERATING PROCEDURE
1. Removing the top panel ~ back panel
(1) Remove the screws fixing the top panel and remove it.
(Photo 1)
(2) Remove the screw fixing the service panel, next pull down
the service panel and remove it from the cabinet. (Photo 2)
(3) Remove the screws fixing the front cover and remove it.
(4) Remove the inside and outside connection electric wire.
(5) Remove the screws fixing the back panel and remove it.
Photo 2
2. Removing the inverter assembly
(1) Remove the top panel, front cover, and service panel.
(2) Remove the inside and outside connection electric wire, next
remove the back panel.
(3) Disconnect the noise filter P.C. board 4-way connector
(CN722), fan motor (CN903, CN904) Defrost, discharge
temperature thermistor (CN641) air temperature thermistor
(CN643) LEV A (CN724), LEV B (CN726).
(4) Remove the compressor relay connector. (Photo 3)
(5) Remove the two screws fixing the relay panel, and remove
the inverter assembly. (Photo 3)
3. Removing the inverter P.C. board
(1) Remove the top panel, front panel, and service panel.
(2) Remove all the connectors the lead wire and the earth wire
on the electronic control P.C board.
(3) Remove the compressor relay connector.
(4) Remove the two screws fixing the heat sink, and pull up the
inverter P.C. board.
(5) Remove the screws fixing the transistor module.
(6) Remove the inverter P.C. board.
4. Removing the noise filter
(1) Remove the top panel, front cover, and service panel.
(2) Remove all the connectors the lead wire and earth wire on
the electronic control P.C. board.
(3) Remove the two hooks, then remove the noise filter P.C.
board.
4 Hooks
Front panel
29
PHOTOS
Top panel
Photo 1
Photo 3
Photo 4
Screws of
the heat sink
Inverter
P.C. board
Back panel
Screw of the
service panel
Service panel
Screw of the
relay panel
Compressor connector
Noise filter
P.C. board
Hooks