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Air Conditioner
Mitsubishi Electronics
MUZ-FD09NA, MUZ-FD09NA- U1, MUZ-FD12NA, MUZ-FD12NA- U1 service manual
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36 pages, 1.61 Mb
2
Revision A:
• 3. SPECIFICATION has been corrected.
Contents
Main
SERVICE MANUAL
Wireless type Models
MUZ-FD09NA MUZ-FD09NA- MUZ-FD12NA MUZ-FD12NA-
OUTDOOR UNIT
HFC
Page
Page
3SPECIFICATION
Test condition
3, 4
(2) OPERATION
OPERATING RANGE (1) POWER SUPPLY
OUTLINES AND DIMENSIONS
4
8 in. or more
Unit: inch
REQUIRED SPACE
Page
6REFRIGERANT SYSTEM DIAGRAM
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
ADDITIONAL REFRIGERANT CHARGE (R410A : oz.)
DATA7
MUZ-FD09NA MUZ-FD12NA
7-2. PERFORMANCE CURVE
Indoor intake air DB temperature (F)
Cooling
Indoor intake air WB temperature (F)
Indoor intake air WB temperature (F)
MUZ-FD12NA
14 20 25 30 35 40 45 50 55 60 6570
14 20 25 30 35 40 45 50 55 60 6570
MUZ-FD12NA
7-4. STANDARD OPERATION DATA
7-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY
Input correction factors
MUZ-FD12NA
7-6. TEST RUN OPERATION (How to operate fixed-frequency operation)
8ACTUATOR CONTROL
SERVICE FUNCTIONS
9
9-1. CHANGE IN DEFROST SETTING
MUZ-FD09VA MUZ-FD12VA
9-2. PRE-HEAT CONTROL SETTING
10-2. FAILURE MODE RECALL FUNCTION
1. Flow chart of failure mode recall function for the indoor/outdoor unit
Operational procedure
2. Flow chart of the detailed outdoor unit failure mode recall function
3. Outdoor unit failure mode table
NOTE: Blinking patterns of this mode differ from the ones of Troubleshooting check table (10-3.).
10-3. TROUBLESHOOTING CHECK TABLE
Page
10-4. TROUBLE CRITERION OF MAIN PARTS
10-5. TROUBLESHOOTING FLOW
B Check of open phase
A How to check inverter/compressor
C Check of compressor
F Check of compressor start failure
D Check of compressor winding
E Check of compressor operation time
G Check of outdoor thermistors
H Check of R.V. coil
Unit operates HEAT mode even if it is set to COOL mode.
Unit operates COOL mode even if it is set to HEAT mode.
I Check of outdoor fan motor
J Check of power supply
K Check of LEV (Expansion valve)
L Check of inverter P.C. board
M How to check miswiring and serial signal error
N Electromagnetic noise enters into TV sets or radios
10-6. TEST POINT DIAGRAM AND VOLTAGE
1. Inverter P.C. board
11-1. MUZ-FD09NA MUZ-FD12NA
1. Removing the cabinet
Photo 1
11 DISASSEMBLY INSTRUCTIONS
<"Terminal with locking mechanism" Detaching points>
2. Removing the inverter assembly, inverter P.C. board
3. Removing R.V. coil
Photo 5
Photo 3
Photo 4 (Inverter assembly)
5. Removing outdoor fan motor
6. Removing the compressor and 4-way valve
Photo 8
NOTE:
Photo 6