Mitsubishi Electronics MUZ-D36NA, U1 Photo 5 Inverter assembly, Removing R.V. coil MUZ, Hps

Page 40

OPERATING PROCEDURE

PHOTOS

2. Removing the inverter assembly, P.C. board and

Photo 4

power board

 

(1) Remove the top panel, cabinet, service panel and the back

 

panel. (Refer to 1.)

Screws of the reactor

(2) Disconnect the following connectors;

 

<Electronic control P.C. board>

 

CN931 and CN932 (Fan motor)

 

CN795 (LEV)

 

CN661 (Discharge temperature thermistor, defrost

HPS

thermistor (MUZ) and outdoor heat exchanger

 

temperature thermistor)

 

CN663 (Ambient temperature thermistor)

 

CN681 (High pressure switch) (MUZ)

Discharge temperature

<Noise filter P.C. board>

thermistor

CN912 (4-way valve) (MUZ)

 

<Compressor>

 

<Reactor>

 

(4)Remove the screws fixing the relay panel.

(5)Remove the inverter assembly.

(6)Disconnect all connectors and lead wires on the electronic control P.C. board.

(7)Remove the electronic control P.C. board from the inverter

 

assembly.

Photo 5 (Inverter assembly)

(8)

Remove the screws fixing the power board assembly.

(9)

Disconnect all connectors and lead wires on the power

Screws of the power board assembly

 

board.

(10)

Remove the power board from the inverter assembly.

 

(11) Disconnect all connectors and lead wires on the noise filter

 

 

P.C. board.

 

(12)

Remove the noise filter P.C. board from the inverter

 

 

assembly.

 

3. Removing R.V. coil (MUZ)

(1)Remove the top panel, cabinet, service panel and the back panel. (Refer to 1.)

(2) Disconnect the following connectors;

 

<Noise filter P.C. board>

Screws of the relay panel

CN912 (4-way valve)

(3) Remove the R.V. coil. (Photo 9)

Photo 6

 

 

Screws of the

 

relay panel

Propeller

40

Image 40
Contents Outdoor Unit Page Technical Changes Part Names and FunctionsTotal HspfCOP TNB220FMCHTARI Operating RangeSeer Outlines and Dimensions Required SpaceWiring Diagram MUY-D30NA MUY-D36NA Refrigerant System Diagram LEVMAX. Refrigerant Piping Length and MAX. Height Difference Data Performance Data Cooling CapacityPerformance Curve Cooling MUZ-D30NA MUZ-D36NA MUY-D30NAMUY-D36NA HeatingCondensing Pressure Cooling 380 420 340 300 26068 100 105F Standard Operation Data MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NAInput correction factors Test RUN Operation How to operate fixed-frequency operation Actuator Control Outdoor FAN Motor ControlR.V. Coil Control MUZ Relation between main sensor and actuatorChange in Defrost Setting Service FunctionsPRE-HEAT Control Troubleshooting Take care of the following during servicingFailure Mode Recall Function Operational procedure Outdoor unit failure mode table LED Troubleshooting Check Table LED1 LED2MUZ BLK WHT WHT RED YLW BRNHow to check inverter/ compressor Troubleshooting FlowCheck of outdoor thermistors Check of R.V. coil MUZ-D30/36 Heating operation does not workCheck of power supply Check of outdoor fan motorCheck of compressor start failure Check of LEVHow to check miswiring and serial signal error Check of HPS Electromagnetic noise enters into TV sets or radios Test Point Diagram and Voltage Outdoor electronic control P.C. boardNoise filter P.C. board Outdoor power board CN2CN3 CN5Disassembly Instructions Removing the cabinet PhotoRemoving R.V. coil MUZ Photo 5 Inverter assemblyHPS Temperature thermistor and ambient temperature ThermistorRemoving outdoor fan motor MUZRemoving the compressor and 4-way valve Photo Removing the reactorPage Specifications subject to change without notice

MUY-D36NA, MUZ-D30NA, U1, MUY-D30NA, MUZ-D36NA specifications

Mitsubishi Electronics has long been at the forefront of innovation in heating and cooling solutions, and its latest lineup of multi-zone air conditioning units—MUZ-D36NA, MUY-D30NA, U1, MUZ-D30NA, and MUY-D36NA—reflects this commitment to quality and efficiency. Designed for both residential and commercial applications, these units offer advanced features that enhance comfort and energy savings.

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