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Documents & Manuals

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Tensioning Guide
Belt-diagram
C-120 pulleys
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Work Order Templates

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Daily Electrical System Inspection
Replace Roller and Pulley
Install Engine B-120
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Procedures

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Motion Industries
Applied Industrial Technologies
Electrical Brothers
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Parts

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Drive Motor
B2 Rollers
Tensioning System
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Mitsubishi Outdoor Unit Split-Type Air Conditioner MUZ-AP42VG

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Maintenance Plans for Mitsubishi Outdoor Unit Split-Type Air Conditioner Model MUZ-AP42VG

Integrate maintenance plans directly into your work orders in MaintainX.

Cabinet Removal

Remove the screw fixing the service panel

Pull down the service panel and remove it

Disconnect the power supply cord and indoor/outdoor connecting wire

Remove the screws fixing the top panel

Remove the top panel

Remove the screws fixing the cabinet

Remove the cabinet

Remove the screws fixing the back panel

Remove the back panel

Run this procedure

Compressor / 4-Way Valve Removal

(1) Remove the cabinet and panels. (Refer to section 1.)

(2) Remove the inverter assembly. (Refer to section 2.)

(3) Recover gas from the refrigerant circuit.

NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm2 (0 MPa).

(4) Detach the brazed part of the suction and the discharge pipe connected with compressor.

(5) Remove the nuts of compressor legs.

(6) Remove the compressor.

(7) Detach the brazed part of pipes connected with 4-way valve.;

Run this procedure

Compressor Operation Time Check

Connect the compressor and activate the inverter

Compressor connected and inverter activated

Start heating or cooling operation by pressing EMERGENCY OPERATION switch on the indoor unit

Heating or cooling operation started

Time from the start of compressor to the stop of compressor due to overcurrent

Sign off on the compressor operation time check

Run this procedure

Compressor Winding Check

Warning: Disconnect the connector between the compressor and the power module (IC700) before proceeding

Ohmmeter zeroed before measurement

Measure the resistance between the lead wires at point BLK-WHT

Measure the resistance between the lead wires at point BLK-RED

Measure the resistance between the lead wires at point WHT-RED

Judgement

Sign off on the compressor winding check

Run this procedure

Inverter Assembly Removal

Remove the cabinet and panels. (Refer to section 1.)

Disconnect the lead wire to the reactor and the following connectors: <Inverter P.C. board> CN721 (R.V. coil) CN722 (Defrost heater)(MUZ-AP•VGH) CN931, CN932 (Fan motor) CN641 (Defrost thermistor and discharge temperature thermistor) CN643 (Ambient temperature thermistor) CN644 (Outdoor heat exchanger temperature thermistor) CN724 (LEV)

Remove the compressor connector (CN61).

Remove the screws fixing the heat sink support and the separator.

Remove the fixing screws of the terminal block support and the back panel.

Remove the inverter assembly.

Remove the screw of the earth wire and screw of the terminal block support.

Remove the heat sink support from the P.C. board support.

Remove the screw of the inverter P.C. board and remove the inverter P.C. board from the P.C. board support.

Run this procedure