Mitsubishi Electric MUZ-GE12NAH2 User Manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS ····················· 4
3. SPECIFICATION ················································ 6
4. OUTLINES AND DIMENSIONS ······················ 10
5. WIRING DIAGRAM ·········································· 13
6. REFRIGERANT SYSTEM DIAGRAM ············· 25
7. DATA ································································ 28
8. ACTUATOR CONTROL ··································· 42
9. SERVICE FUNCTIONS ··································· 43
10. TROUBLESHOOTING ····································· 44
11. DISASSEMBLY INSTRUCTIONS ···················· 64
Models
SPLIT-TYPE AIR CONDITIONERS
OUTDOOR UNIT
Indoor unit service manual
MSZ-GE•NA MSY-GE•NA Series (OBH548)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
HFC
utilized
R410A
No. OBH549
REVISED EDITION-F
PARTS CATALOG (OBB549)
Please void OBH549 REVISED EDITION-E.
MUZ-GE09NA/NA2
MUZ-GE12NA/NA2
MUZ-GE15NA, -
1
/NA2
MUZ-GE09NA
MUZ-GE09NA2
MUZ-GE12NA
MUZ-GE12NA2
MUZ-GE15NA,
-
1
MUZ-GE15NA2
MUZ-GE18NA,
-
1
MUZ-GE24NA
Revision F:
• MUZ-GE09/12/15NA2, MUZ-GE09/12/15NAH2
and MUY-GE09/12/15NA2 have been added.
MUZ-GE09NAH
MUZ-GE09NAH2
MUZ-GE12NAH
MUZ-GE12NAH2
MUZ-GE15NAH
MUZ-GE15NAH2
MUZ-GE18NAH
MUY-GE09NA/NA2
MUY-GE12NA/NA2
MUY-GE15NA, -
1
/NA2
TM
MUY-GE18NA,
-
1
MUY-GE24NA
MUY-GE09NA
MUY-GE09NA2
MUY-GE12NA
MUY-GE12NA2
MUY-GE15NA,
-
1
MUY-GE15NA2
MUZ-GE09NAH/NAH2
MUZ-GE12NAH/NAH2
MUZ-GE15NAH/NAH2

Mitsubishi Electric MUZ-GE12NAH2 Specifications

General

Type	Heat Pump
Cooling Capacity	12, 000 BTU/h
Heating Capacity	13, 600 BTU/h
Heating Seasonal Performance Factor (HSPF)	10.0
Refrigerant	R410A
Voltage	208 / 230 V
Phase	1
Compressor Type	Inverter
Indoor Unit Weight	22 lbs
Operating Temperature (Cooling)	14°F to 115°F
Sound Level	49 dB (Outdoor)
Power Supply	208/230V, 60Hz

Summary

SPECIFICATION

OUTLINES AND DIMENSIONS

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

DATA

ACTUATOR CONTROL

TROUBLESHOOTING

CAUTIONS ON TROUBLESHOOTING

Important safety and handling precautions before and during troubleshooting.

FAILURE MODE RECALL FUNCTION

Guide on how to recall and interpret stored failure codes indicated by LED blinking patterns.

OUTDOOR UNIT FAILURE MODE TABLE

Lists failure modes, LED indications, conditions, and remedies for outdoor unit abnormalities.

TROUBLESHOOTING CHECK TABLE

Detailed table linking symptoms, LED indications, abnormal points, and corrective actions.

TROUBLE CRITERION OF MAIN PARTS

Specifies resistance/voltage criteria for testing key components.

TROUBLESHOOTING FLOWCHARTS

Step-by-step diagnostic flows for common issues.

DISASSEMBLY INSTRUCTIONS

GENERAL CABINET REMOVAL

INVERTER ASSEMBLY/P.C. BOARD REMOVAL