Mitsubishi Electric MUM30NN2 - User Manual

SERVICE MANUAL
SPLIT-TYPE AIR CONDITIONERS
CONTENTS
1. FEATURES ························································2
2.TECHNICAL CHANGES ····································4
3. PART NAMES AND FUNCTIONS······················5
4. SPECIFICATIONS ··············································7
5. DATA ································································12
6. OUTLINES AND DIMENSIONS ······················23
7. WIRING DIAGRAM ··········································26
8. REFRIGERANT SYSTEM DIAGRAM ··············32
9. MICROPROCESSOR CONTROL ····················35
10. SERVICE FUNCTIONS ····································43
11. TROUBLESHOOTING ······································44
12. DISASSEMBLY INSTRUCTIONS ····················59
13. PARTS LIST······················································70
14. OPTIONAL PARTS ··········································79
Wireless type
Models
MS09NW
(W)
· MU09NW MUM30NN
MS12NN
(W)
· MU12NN MUM30NN2
MS15NN
(W)
· MU15NN
MS17NN
(W)
· MU17NN
MS09NW2
(W)
· MU09NW2
MS12NN2
(W)
· MU12NN2
MS15NN2
(W)
· MU15NN2
MS17NN2
(W)
· MU17NN2
No. OB192
The Slim Line.
From Mitsubishi Electric.
L
I
S
T
E
D
R
MS12NN MS12NN2
MS15NN MS15NN2
MS17NN MS17NN2
INDOOR UNIT
MU12NN MU12NN2
MU15NN MU15NN2
MU17NN MU17NN2
OUTDOOR UNIT
Remote
controller
Refer to our Service Manual OB202 when the
indoor unit is used in the multi-system operation.
Applied models are MS09NW and MS15NN.
REVISED EDITION -B
Revision:
● MS09NW2, MS12NN2, MS15NN2 and
MS17NN2 has been added.
● Parts List has been partially modified.
● Please void OB192 REVISED EDITION -A.

Summary

1 FEATURES

4 SPECIFICATIONS

MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE

MAX. HEIGHT DIFFERENCE

Details on maximum height difference for units.

5 DATA

1. PERFORMANCE DATA

Cooling capacity and performance data for various models.

2) COOLING CAPACITY CORRECTIONS

Correction factors for cooling capacity based on piping length.

3. CONDENSING PRESSURE AND SUCTION PRESSURE

4. STANDARD OPERATION DATA

5. OPERATING RANGE

(1) POWER SUPPLY

(2) OPERATION

6 OUTLINES AND DIMENSIONS

INDOOR UNIT

OUTDOOR UNIT

7 WIRING DIAGRAM

MS09 NW INDOOR UNIT MODEL WIRING DIAGRAM

Electrical wiring schematic for MS09NW indoor unit.

MU09 NW OUTDOOR UNIT MODEL WIRING DIAGRAM

Electrical wiring schematic for MU09NW outdoor unit.

8 REFRIGERANT SYSTEM DIAGRAM

9 MICROPROCESSOR CONTROL

WIRELESS REMOTE CONTROLLER

9-8. EMERGENCY-TEST OPERATION

10 SERVICE FUNCTIONS

10-1. AUTO RESTART FUNCTION

11 TROUBLESHOOTING

11-1. Cautions on troubleshooting

Important safety and handling precautions before troubleshooting.

11-2 Instruction of troubleshooting

11-2-2 Trouble criterion of main parts

11-2-3 Trouble criterion of main parts

B Check of remote controller and receiver P.C. board

C Check of indoor electronic control P.C. board

D Check of outdoor unit

TEST POINT DIAGRAM AND VOLTAGE MS09 NW MS09 NW2 Indoor electronic control P.C. board

TEST POINT DIAGRAM AND VOLTAGE MS12 NN MS15 NN MS17 NN MS12 NN2 MS15 NN2 MS17 NN2 Indoor electronic control P.C. board

TEST POINT DIAGRAM AND VOLTAGE MUM30 NN Outdoor electronic control P.C. board

TEST POINT DIAGRAM AND VOLTAGE MUM30 NN2 Outdoor electronic control P.C. board

RELAY OPERATION

12 DISASSEMBLY INSTRUCTIONS

12-1 MS09 NW MS09 NW2 INDOOR UNIT OPERATING PROCEDURE

Step-by-step guide for disassembling MS09NW/MS09NW2 indoor units.

12-2 MS12 NN, MS15 NN, MS17 NN INDOOR UNIT OPERATING PROCEDURE

12-3 MU09 NW MU09 NW2 OUTDOOR UNIT OPERATING PROCEDURE

12-4 MU12 NN MU15 NN MU17 NN MU12 NN2 MU15 NN2 MU17 NN2 OUTDOOR UNIT OPERATING PROCEDURE

12-5 MUM30 NN MUM30 NN2 OUTDOOR UNIT OPERATING PROCEDURE

13 PARTS LIST

MS09 NW (W) MS09 NW2 (W) 13-1. INDOOR UNIT STRUCTURAL PARTS

Mitsubishi Electric MUM30NN2 Specifications