Mitsubishi Electronics
MUZ-D30NA, MUZ-D36NA, U1
service manual
MUY-D30NA MUY-D36NA
Troubleshooting
Wiring Diagram
Dimension
Disassembly Instructions
Operational procedure
Change in Defrost Setting
Check of power supply
Failure Mode Recall Function
Page 8
MUY-D30NA
MUY-D36NA
8
Page 7
Page 9
Image 8
Page 7
Page 9
Contents
Outdoor Unit
Page
Technical Changes
Part Names and Functions
Total
Hspf
COP
TNB220FMCHT
Seer
Operating Range
ARI
Outlines and Dimensions
Required Space
Wiring Diagram
MUY-D30NA MUY-D36NA
Refrigerant System Diagram
LEV
MAX. Refrigerant Piping Length and MAX. Height Difference
Data
Performance Data Cooling Capacity
Performance Curve Cooling
MUZ-D30NA MUZ-D36NA MUY-D30NA
MUY-D36NA
Heating
Condensing Pressure Cooling
380 420 340 300 26068 100 105F
Standard Operation Data
MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NA
Input correction factors
Test RUN Operation How to operate fixed-frequency operation
Actuator Control
Outdoor FAN Motor Control
R.V. Coil Control MUZ
Relation between main sensor and actuator
PRE-HEAT Control
Service Functions
Change in Defrost Setting
Troubleshooting
Take care of the following during servicing
Failure Mode Recall Function
Operational procedure
Outdoor unit failure mode table
LED
Troubleshooting Check Table
LED1 LED2
MUZ
BLK WHT WHT RED
YLW BRN
How to check inverter/ compressor
Troubleshooting Flow
Check of outdoor thermistors
Check of R.V. coil MUZ-D30/36
Heating operation does not work
Check of power supply
Check of outdoor fan motor
Check of compressor start failure
Check of LEV
How 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. board
Noise filter P.C. board
Outdoor power board
CN2
CN3
CN5
Disassembly Instructions
Removing the cabinet Photo
HPS
Photo 5 Inverter assembly
Removing R.V. coil MUZ
Temperature thermistor and ambient temperature
Thermistor
Removing outdoor fan motor
MUZ
Removing the compressor and 4-way valve Photo
Removing the reactor
Page
Specifications subject to change without notice
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Contents