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SCM40ZJ-S
Mitsubishi SCM40ZJ-S User Manual
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SERVICE MANUAL
Manual No.'1
1•SCM-SM-1
10
INVERTER MULTI-SPLIT SYSTEM
RESIDENTIAL AIR CONDITIONERS
(Split system, air to air heat pump type)
(OUTDOOR UNIT)
SCM40ZJ-S
45ZJ-S
50ZJ-S1
60ZJ-S1
SCM71ZJ-S1
80ZJ-S1
100ZJ-S1
125ZJ-S1
(INDOOR UNIT)
Wall mounted type
SRK20ZJX-S
25ZJX-S
35ZJX-S
50ZJX-S1
60ZJX-S1
SRK25ZJR-S
35ZJR-S
SRK20ZJ-S
25ZJ-S
35ZJ-S
50ZJ-S
SRK71ZK-S
Floor standing type
SRF25ZJX-S
35ZJX-S
50ZJX-S1
Ceiling cassette-4way compact type
FDTC25VD
35VD
50VD
60VD
Ceiling suspended type
FDEN50VD
Duct connected Low/Middle static pressure type
FDUM50VF
Ceiling concealed type
SRR25ZJ-S
35ZJ-S
50ZJ-S
60ZJ-S
updated November 25, 2011
2
Table of Contents
Default Chapter
1
Service Manual
1
Table of Contents
2
Checking Procedure
5
How to Read the Model Name
5
Table of Models
5
1 Outline of Operation Control by Microcomputer
6
SRK,SRF and SRR Series
6
Operation Control Function by Remote Controller
6
Operation Section
8
Unit Display Section
9
Unit ON/OFF Button
10
Auto Restart Function
10
Custom Cord Switching Procedure
11
Selection of the Annual Cooling Function
12
High Power Operation
12
Econo Operation
13
Flap and Louver Control (SRK and SRF Series Only)
13
Air Outlet Selection (SRF Series Only)
16
Auto Operation (SRK Series Only)
16
Timer Operation
17
Installation Location Setting (SRK Series Only)
18
Determining the Operating Mode
18
Drain Motor (DM) Control (SRR Series Only)
19
FDTC, FDEN and FDUM Series
20
Remote Controller (Optional Parts)
20
Operation Control Function by the Wired Remote Controller
23
Operation Control Function by the Indoor Controller
24
Outline of Heating Operation
35
Summary
35
Operation of Major Functional Components in Heating Mode
35
Hot Keep Operation
35
Defrosting Operation
36
Outline of Cooling Operation
37
Summary
37
Operation of Major Functional Components in Cooling Mode
37
Outline of Automatic Operation
38
Determination of Operation Mode
38
Operation Permission/Prohibition Control
39
The Operation Mode Is Switched over between Permission and Prohibition by Releasing the Jumper Wire (J3) on the Indoor PCB
39
In the Case of Cnt Input on (Operation Permission)
39
In the Case of Cnt Input off (Operation Prohibition)
39
External Control (Remote Display) /Control of Input Signal
40
External Control (Remote Display) Output
40
Control of Input Signal
40
Protective Control Function
41
Frost Prevention Control
41
Cooling Overload Protective Control
41
Cooling High Pressure Control
41
Cooling Low Outdoor Temperature Protective Control
42
Heating High Pressure Control
43
Heating Overload Protective Control
44
Heating Low Outdoor Temperature Protective Control
44
Freezing Cycle System Protective Control
45
Crankcase Heater
45
Inching Prevention
45
Compressor Overheat Protection
45
Current Safe
46
Current Cut
47
Outdoor Unit Failure
47
Indoor Fan Motor Protection
47
Discharge Pipe Sensor Disconnection Protection Control
47
Regulation of Outdoor Air Flow
47
Serial Signal Transmission Error Protection
48
Rotor Lock
48
Outdoor Fan Motor Protection
48
Outdoor Fan Control at Low Outdoor Temperature
48
Outdoor Unit Fan Control at Overload
49
Anomalous Power Transistor
50
Power Transistor Overheat Protection
50
Control of the Flowing Noise of Refrigerant During Cooling Operation
50
2 Maintenance Data
51
SRK,SRF and SRR Series
51
Cautions
51
Items to Check before Troubleshooting
51
Troubleshooting Procedure (if the Air Conditioner Does Not Run at All)
51
Troubleshooting Procedure (if the Air Conditioner Runs)
52
Self-Diagnosis Table
53
Service Mode (Trouble Mode Access Function)
55
Remote Controller Setting
57
Inspection Procedures Corresponding to Detail of Trouble
65
Current Cut
66
Error of Signal Transmission
67
Over Heat of Compressor
67
Outdoor Fan Motor Error
68
Phenomenon Observed after Shortcircuit, Wire Breakage on Sensor
69
Checking the Indoor Electrical Equipment
70
How to Make Sure of Wireless Remote Controller
71
Outdoor Unit Inspection Points
72
FDTC, FDEN and FDUM Series
78
Diagnosing of Microcomputer Circuit
78
Selfdiagnosis Function
78
Troubleshooting at the Indoor Unit
82
Troubleshooting Procedure
82
Check of Anomalous Operation Deta with the Remote Controller
89
Inverter Checker for Diagnosis of Inverter Output
90
Outdoor Unit Inspection Points
90
List of Troubles
91
Troubleshooting Flow
91
Troubleshooting
92
Troubleshooting
101
Discharge Pipe
122
Communication Error
127
3 Electrical Wirings
138
Outdoor Units
138
Indoor Units
143
Wall Mounted Type (SRK)
143
Circuit Board
145
Floor Standing Type (SRF)
147
Ceiling Concealed Type (SRR)
149
Ceiling Cassette-4Way Compact Type (FDTC)
150
Ceiling Suspended Type (FDEN)
151
Duct Connected Low/Middle Static Pressure Type (FDUM)
152
4 Piping Systems
153
5 Installation Manual
158
Outdoor Units
158
Models SCM40ZJ-S, 45ZJ-S
158
Selection of Installation Location
159
Connection of Refrigerant Pipings
160
Installation of Outdoor Unit
160
Earthing Work
161
Models SCM50ZJ-S1, 60ZJ-S1
162
Safety Precautions
162
Models SCM71ZJ-S1, 80ZJ-S1
166
Models SCM100ZJ-S1, 125ZJ-S1
170
Indoor Units
174
Wall Mounted Type (SRK)
174
Installation of Indoor Unit
175
Electrical Wiring Work
177
Installation Manual for Indoor Unit
178
Floor Standing Type (SRF)
186
Installation of Remote Control
189
Ceiling Concealed Type (SRR)
190
Indoor Unit
191
Wireless Remote Control
191
Ceiling Cassette-4Way Compact Type (FDTC)
194
Ceiling Suspended Type (FDEN)
200
Duct Connected Low/Middle Static Pressure Type (FDUM)
204
Replacement Procedure of the Fan Unit (for FDUM Model)
209
6 Table of Functions Connected Wired Remote Controllers (Rc-E4, E5)
210
Front View
220
5
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Mitsubishi SCM40ZJ-S Specifications
General
Brand
Mitsubishi
Model
SCM40ZJ-S
Category
Air Conditioner
Language
English
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