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Mitsubishi Electric MUH12TN User Manual

Mitsubishi Electric MUH12TN
129 pages
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SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. FEATURES·························································2
2. TECHNICAL CHANGES ····································5
3. PART NAMES AND FUNCTIONS······················7
4. INDOOR UNIT COMBINATION························10
5. SPECIFICATION···············································11
6. DATA·································································17
7. OUTLINES AND DIMENSIONS ·······················39
8. WIRING DIAGRAM ··········································43
9. REFRIGERANT SYSTEM DIAGRAM··············51
10. MICROPROCESSOR CONTROL ····················54
11. SERVICE FUNCTIONS·····································72
12. TROUBLESHOOTING······································75
13. DISASSEMBLY INSTRUCTIONS···················101
14. PARTS LIST····················································114
15. OPTIONAL PARTS·········································126
Wireless type
Models
MSH09TW · MUH09TW
MSH12TN · MUH12TN
MSH15TN · MUH15TN
MSH17TN · MUH17TN
MSH09TW
-
· MUH09TW
-
MSH12TN
-
· MUH12TN
-
· MUH12TN
-
MSH15TN
-
· MUH15TN
-
· MUH15TN
-
MSH17TN
-
· MUH17TN
-
U1U1
U2
U1U1
U2
U1U1
U1U1
No. OB275
REVISED EDITION-D
The Slim Line.
From Mitsubishi Electric.
L
I
S
T
E
D
CUS
MSH12TN
MSH15TN
MSH17TN
INDOOR UNIT
MUH15TN
OUTDOOR UNIT
Remote
controller
MSH12TN -
MSH15TN -
MSH17TN -
U1
U1
U1
MUH15TN - MUH15TN -
U2U1
TM
Inverter-controlled multi system Model
· MXZ30TN
· MXZ30TN2
Revision:
MUH12TN- has been added.
MUH15TN- has been added.
REFRIGERANT SYSTEM DIAGRAM of
MXZ30TN and MXZ30TN2 has partly been
changed.
PARTS LIST of MXZ30TN and MXZ30TN2
has partly been changed
Please void OB275 Revised edition-C.
U2
U2
Indication of
model name
Indication of
model name
OB275--1.qxp 03.12.2 16:49 Page 1

Table of Contents

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Mitsubishi Electric MUH12TN Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMUH12TN
CategoryAir Conditioner
LanguageEnglish

Summary

1 FEATURES

DIFFERENT POINTS BETWEEN MODELS FOR USA AND CANADA

Compares operational differences between USA and Canada models regarding defrosting and temperature settings.

2 TECHNICAL CHANGES

3 PART NAMES AND FUNCTIONS

INDOOR UNIT PARTS

Illustrates and lists structural parts of the indoor unit, including filters and vanes.

OUTDOOR UNIT PARTS

Illustrates and lists structural parts of the outdoor unit, showing air inlets and outlets.

REMOTE CONTROLLER

Details the components and functions of the wireless remote controller.

4 INDOOR UNITS COMBINATION

5 SPECIFICATIONS

INDOOR UNIT MODEL SPECIFICATIONS

Lists technical specifications for indoor units regarding capacity, power, and dimensions.

OUTDOOR UNIT MODEL SPECIFICATIONS

Lists technical specifications for outdoor units, including power, dimensions, and components.

REMOTE CONTROLLER SPECIFICATIONS

Lists specifications for the wireless remote controller, including voltage and type.

REFRIGERANT PIPING SPECIFICATIONS

Details specifications for refrigerant pipe size, length, and charge.

OPERATING RANGE

Outlines the operating temperature and humidity ranges for cooling and heating.

6 DATA

6-1. PERFORMANCE DATA

Presents performance data including cooling capacity under various conditions.

6-2. PERFORMANCE CURVE

Illustrates performance curves for cooling and heating operations based on temperatures.

6-3. Condensing pressure

Shows condensing pressure graphs for cooling and heating operations at different temperatures.

6-4. STANDARD OPERATION DATA

Provides standard operational data for the units, including electrical and refrigerant parameters.

6-5. OPERATING RANGE

Details the operating voltage and conditions for the units, including intake air temperatures.

6-6. OUTLET AIR SPEED AND COVERAGE RANGE

Specifies outlet air speed and coverage range for different models and modes.

6-7. ADDITIONAL REFRIGERANT CHARGE (R22(oz.))

Lists additional refrigerant charge requirements based on pipe length.

6-8. CAPACITY AND THE INPUT CURVES

Presents capacity and input curves for indoor units based on frequency.

6-9. Capacity and input correction by means of inverter output frequency

Shows capacity and input corrections based on inverter output frequency.

6-10. Outdoor low pressure and outdoor unit current

Illustrates outdoor low pressure and current based on operating conditions.

7 OUTLINES AND DIMENSIONS

INDOOR UNIT DIMENSIONS

Shows dimensional drawings and measurements for the indoor unit.

OUTDOOR UNIT DIMENSIONS

Shows dimensional drawings and measurements for the outdoor unit.

REQUIRED SPACE

Illustrates the necessary clearance space around the outdoor unit for installation.

8 WIRING DIAGRAM

MSH09TW/MUH09TW WIRING DIAGRAM

Provides wiring diagrams for MSH09TW and MUH09TW indoor and outdoor units.

9 REFRIGERANT SYSTEM DIAGRAM

REFRIGERANT SYSTEM DIAGRAM MODELS

Shows refrigerant system diagrams for specific indoor/outdoor unit combinations.

10 MICROPROCESSOR CONTROL

WIRELESS REMOTE CONTROLLER OPERATION

Explains the functions and operation of the wireless remote controller buttons.

INDOOR UNIT DISPLAY AND INDICATORS

Describes the indoor unit's operation indicator and its meaning.

10-1. “I FEEL CONTROL” OPERATION

Details the operation of the "I FEEL CONTROL" feature based on room temperature.

11 SERVICE FUNCTIONS

11-1. COMPULSORY DEFROSTING MODE FOR SERVICE

Describes how to perform compulsory defrosting for service purposes.

11-2. CHANGE IN DEFROST SETTING

Explains how to change defrost settings via jumper wires.

11-3. TIMER SHORT MODE

Details how to shorten timer settings for service.

11-4. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

Explains modifications for individual remote controller operation.

11-5. AUTO RESTART FUNCTION

Describes the auto restart function and how to set remote controllers.

12 TROUBLESHOOTING

12-1. CAUTIONS ON TROUBLESHOOTING

Provides important cautions to follow before troubleshooting unit issues.

12-2. TROUBLESHOOTING INSTRUCTION FLOW

Offers a step-by-step guide for troubleshooting system issues.

TEST POINT DIAGRAM AND VOLTAGE

INDOOR ELECTRONIC CONTROL P.C. BOARD

Illustrates test points and voltage values for the indoor control board.

13 DISASSEMBLY INSTRUCTIONS

INDOOR UNIT DISASSEMBLY

Details disassembly steps for the indoor unit components.

OUTDOOR UNIT DISASSEMBLY

Details disassembly steps for outdoor unit components.

14 PARTS LIST

INDOOR UNIT PARTS

Lists structural and electrical parts for the indoor unit.

OUTDOOR UNIT PARTS

Lists structural and electrical parts for outdoor units.

ACCESSORIES AND REMOTE CONTROLLER PARTS

Lists accessories and remote controller parts.

15 OPTIONAL PARTS

REFRIGERANT PIPES

Lists optional refrigerant pipes and their specifications.

AIR CLEANING FILTER

Describes air cleaning filters and their maintenance.

DEODORIZING FILTER

Details deodorizing filters and their cleaning instructions.

DIFFERENT-DIAMETER PIPE

Lists different diameter pipes and their compatibility.

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