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Mitsubishi Electric MUZ-HM09NA-U1 User Manual

Mitsubishi Electric MUZ-HM09NA-U1
66 pages
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Models
MUZ-HM09NA
-
U1
,
U8
MUZ-HM18NA
-
U1
MUZ-HM09NA2
-
U1
,
U8
MUZ-HM18NA2
-
U1
MUZ-HM12NA
-
U1
,
U8
MUZ-HM24NA
-
U1
MUZ-HM12NA2
-
U1
,
U8
MUZ-HM24NA2
-
U1
MUZ-HM15NA
-
U1
MUZ-HM15NA2
-
U1
HFC
utilized
R410A
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
MUZ-HM24NA
PARTS CATALOG (OBB747)
INDOOR UNIT
SERVICE MANUAL
OUTDOOR UNIT
No. OBH747
REVISED EDITION-C
OBH747 REVISED EDITION-B is void.
Revision C:
• MUZ-HM09/12NA
-
U1
, MUZ-HM09/12NA2
-
U1
have been added.
Indoor unit service manual
MSZ-HM•NA Series (OBH746)
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS ····················· 4
3. SPECIFICATION ················································ 5
4. OUTLINES AND DIMENSIONS ······················ 10
5. WIRING DIAGRAM ·········································· 12
6. REFRIGERANT SYSTEM DIAGRAM ············· 15
7. DATA ································································ 19
8. ACTUATOR CONTROL ··································· 32
9. SERVICE FUNCTIONS ··································· 33
10. TROUBLESHOOTING ····································· 34
11. DISASSEMBLY INSTRUCTIONS ···················· 59
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Mitsubishi Electric MUZ-HM09NA-U1 Specifications

General IconGeneral
Cooling Capacity9, 000 BTU
Heating Capacity10, 900 BTU
EER Rating12.5
RefrigerantR410A
Voltage208/230V
Compressor TypeInverter
Weight (Indoor Unit)20 lbs
HSPF10.0
Indoor Unit Weight20 lbs
Operating Temperature (Cooling)14°F to 115°F
Weight (Outdoor Unit)74 lbs
Power Supply208/230V, 60Hz
TypeMini-Split Heat Pump

Summary

TECHNICAL CHANGES

SPECIFICATIONS

WIRING DIAGRAMS

REFRIGERANT SYSTEM DIAGRAMS

PERFORMANCE DATA AND CHARTS

PERFORMANCE DATA (Cooling & Heating)

Tables detailing cooling and heating capacities for various models.

PERFORMANCE CURVES (Cooling)

Graphs showing cooling capacity and power consumption vs. temperature.

SERVICE FUNCTIONS

TROUBLESHOOTING

CAUTIONS ON TROUBLESHOOTING

Safety precautions and general checks before starting troubleshooting.

FAILURE MODE RECALL FUNCTION

Procedure to recall and interpret error codes from the unit.

TROUBLESHOOTING CHECK TABLE

Table listing symptoms, LED indications, conditions, and remedies.

TROUBLE CRITERION OF MAIN PARTS

Resistance/voltage checks for key components like thermistors and compressor.

TROUBLESHOOTING FLOW: INVERTER/COMPRESSOR CHECK

Diagnostic steps for inverter and compressor issues.

TROUBLESHOOTING FLOW: OPEN PHASE CHECK

Procedure to check for open phase in the inverter output.

TROUBLESHOOTING FLOW: COMPRESSOR WINDING CHECK

Steps to check the compressor winding resistance.

TROUBLESHOOTING FLOW: COMPRESSOR OPERATION TIME CHECK

How to measure compressor operation time before overcurrent.

TROUBLESHOOTING FLOW: COMPRESSOR START FAILURE CHECK

Steps to diagnose and resolve compressor start failures.

TROUBLESHOOTING FLOW: MISWIRING AND SERIAL SIGNAL ERROR CHECK

Procedure to identify and resolve wiring and communication errors.

TEST POINT DIAGRAM AND VOLTAGE

Diagrams showing test points and voltage readings on the inverter P.C. board.

DISASSEMBLY INSTRUCTIONS

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