Mitsubishi Heavy Industries FDC71VNX-W Manuals

Manuals and User Guides for Mitsubishi Heavy Industries FDC71VNX-W. We have 1 Mitsubishi Heavy Industries FDC71VNX-W manual available for free PDF download: Service Manual

Mitsubishi Heavy Industries FDC71VNX-W Service Manual (150 pages)

HYPER INVERTER PACKAGED AIR-CONDITIONERS (Split system, air to air heat pump type)

Brand: Mitsubishi Heavy Industries | Category: Air Conditioner | Size: 20.47 MB

Table of Contents
2
Outline of Operation Control by Microcomputer
5
Remote Control
5
Run/Stop Switch
5
Wired Remote Control
5
Wireless Remote Control
7
SRK Series Only
8
Unit Display Section
9
CPU Reset
10
Operation Control Function by the Wired Remote Control
10
Power Failure Compensation Function
10
Switching Sequence of the Operation Mode Switches of Remote Control
10
Alert Displays
11
Clock Setting Check
11
Communication Check between Indoor Unit and Remote Control
11
Misconnection
11
Parts Layout on Remote Control PCB
12
Auto Operation
13
FDT, FDTC, FDU, FDUM, FDE Series
13
Operation Control Function by the Indoor Control
13
Dehumidifying (DRY) Operation
14
FDT&FDTC Series
14
Operations of Functional Items During Cooling/Heating
14
Combination of Patterns Which Can be Set for the Timer Operations
15
FDU, FDUM, FDE Series
15
Sleep Timer
15
Timer Operation
15
Contents of Operation
16
Ending Condition
16
Hot Start
16
Timer Operations Which Can be Set in Combination
16
Auto Swing Control
17
Automatic Louver Level Setting During Heating
17
Hot Keep
17
Louver Control
17
Cooling
18
Fan Control During Heating Thermostat off
18
Heating
18
Thermostat Operation
18
3-Minute Timer
19
Compressor Inching Prevention Control
19
Fan Control During Cooling Thermostat off
19
Filter Sign
19
Drain Pump Control
20
Drain Pump Motor (DM) Control
20
Operation Check/Drain Pump Test Run Operation Mode
20
Cooling, Dehumidifying Frost Protection
21
Drain Pump Test Run Mode
21
Operation Check Mode
21
Selection of Indoor Fan Speed
21
Confirmation of Connected Units
22
Display to the Remote Control
22
High Ceiling Control
22
Broken Wire Detection
23
External Input/Output Control
23
Output for External Control
23
Short-Circuit Detection
23
In Case of “Pulse Input” Setting
24
Input for External Control
24
Remote Operation
24
Operation Permission/Prohibition
25
In Case of “Level Input” Setting (Factory Default)
27
In Case of “Pulse Input” Setting (Local Setting)
27
Selection of Cooling/Heating External Input Function
27
Temporary Stop Input
27
Fan Control at Heating Startup
28
High Power Operation (RC-EX3A Only)
28
Return Air Temperature Compensation
28
Room Air Temperature Detection Temperature Compensation During Heating
28
Auto Fan Speed Control
29
Fan Circulator Operation (RC-EX3A Only)
29
Peak-Cut Timer
29
The Operation Judgment Is Executed Every 5 Minutes
29
Motion Sensor Control
30
Rcn-E2
30
TOP Screen
30
Auto-Off Control
31
Power Saving / Comfort Control
31
Auto Restart Function
32
Installing Two Air-Conditioners in the same Room
32
SRK Series
32
Unit ON/OFF Button
32
Content of Control
33
Economy Operation
33
High Power Operation
33
Selection of the Annual Cooling Function
33
Flap
34
Flap and Louver Control
34
Louver
34
3D Auto Operation
35
Memory Ap (Flap or Louver Stopped)
35
Swing
35
Comfortable Timer Setting
36
Installation Location Setting
36
Night Setback
36
Details of Control at each Operation Mode
38
Outline of Cooling Operation
38
Outline of Dry(Dehumidifying) Operation
38
Determination of Operation Mode
39
Outline of Automatic Operation
39
Protection Control Function
39
Air Capacity Control
40
Detail of Anti-Frost Operation
40
Frost Prevention Control
40
Reset Conditions
40
Indoor Fan Motor Protection
41
Outdoor Fan Motor Protection
41
Rotor Lock
41
Serial Signal Transmission Error Protection
41
Cooling/Dehumidifying Operation
42
Determination of Compressor Speed
42
Heating Operation
42
Operation Control Function by the Outdoor Control
42
Compressor Soft Start Control
43
Compressor Start Control
43
Control Condition
43
Control Contents
43
Fan Tap Control During Cooling/Defumidifying Operation
44
Fan Tap Control During Heating Operation
44
Outdoor Fan Control
44
Outdoor Fan Tap and Fan Motor Speed
44
Defrost Operation
45
Ending Conditions
45
Starting Conditions
45
Anomalous Stop Control
46
Compressor Discharge Pipe Temperature Protection
46
Protective Control
46
Switching of Defrost Control with SW3-1
46
Anomaly Detection Control by the High Pressure Switch (63H1)
47
Heating High Pressure Protection
47
Low Pressure Control
47
Anomalous Power Transistor Current
48
Anti-Frost Control by the Compressor Frequency Control
48
Over-Current Protection Current Safe Controls I, II
48
Anomalous Stop by the Compressor Start Stop
49
Broken Wire Detection on Temperature Sensor and Low Pressure Sensor
49
Fan Motor Error
49
Refrigerant Quantity Shortage Protection
49
Control Ending Conditions
50
Pump-Down Control
50
Check Indicator Table
51
Diagnosing of Microcomputer Circuit
51
Maintenance Data
51
Selfdiagnosis Function
51
Display Sequence of Error Codes or Inspection Indicator Lamps
53
Error Detecting Timing
53
Occurrence of One Kind of Error
53
Occurrence of Plural Kinds of Error
53
Error Log and Reset
54
Resetting the Error Log
54
Safety Precautions
54
Troubleshooting at the Indoor Unit
54
Control PCB
55
Model FDT Series
55
Replace the Control PCB
55
Power PCB
58
DIP Switch Setting List
60
Module of Part to be Replaced for Outdoor Unit Control
61
Replacement Procedure of Outdoor Unit Control PCB
61
Troubleshooting at the Outdoor Unit
61
Outdoor Inverter PCB Replacement Procedure
63
Fix the Harness on the Harness Clip
64
Target Places Where Harness Bands and Screws Are Removed
64
Voltage Measurement Points
64
Check of Anomalous Operation Data with the Remote Control
66
In Case of RC-EX3A Remote Control
66
In Case of RC-E5 Remote Control
67
Power Transistor Module Terminal Short Circuit Check Procedure
68
Inverter Checker
69
Inverter Checker for Diagnosis of Inverter Output
69
LED ON/OFF Pattern
69
Outdoor Unit Check Points
70
Outdoor Unit Control Failure Diagnosis Circuit Diagram
70
Table of Contents
71
List of Troubles
71
Troubleshooting Flow
71
Operates but Does Not Cool
72
Operates but Does Not Heat
73
Earth Leakage Breaker Activated
74
Excessive Noise/Vibration
75
Louver Motor Failure
78
Power Source System Error (Power Source to Remote Control)
79
Inspect I/U
81
- INSPECT I/U (When 1 or 2 Remote Controls Are Connected)
  81
INSPECT I/U (Connection of 3 Units or more Remote Controls)
82
Wait
82
E5 Communication Error During Operation
88
- Indoor Heat Exchanger Temperature Sensor Anomaly
  89
- Return Air Temperature Sensor Anomaly
  90
E8 Heating Overload Operation
91
Drain Trouble
92
E10 Excessive Number of Connected Indoor Units (more than 17 Units) by Controlling with One Remote Control
93
Address Setting Error of Indoor Units
94
E14 Communication Error between Master and Slave Indoor Units
95
E16 Indoor Fan Motor Anomaly
96
Address Setting Error of Master and Slave Indoor Units
97
E19 Indoor Unit Operation Check, Drain Pump Motor Check Setting Error
98
E20 Indoor Fan Motor Rotation Speed Anomaly
99
E39 Discharge Pipe Temperature Sensor Anomaly
105
High Pressure Error
106
E48 Outdoor Fan Motor Anomaly
107
- Power Transistor Overheat
  107
- Current Cut
  108
- Communication Error between Inverter PCB and Outdoor Unit Control PCB
  110
- Inverter PCB A/F Module Anomaly
  111
- Outdoor Fan Motor Anomaly
  112
- Low Pressure Error or Low Pressure Sensor Anomaly
  113
- Inverter and Fan Motor Anomaly
  115
- Suction Pipe Temperature Sensor Anomaly
  116
- Low Pressure Sensor Anomaly
  117
- Insufficient Refrigerant Amount or Detection of Service Valve Closure
  118
- Compressor Startup Failure
  119
- Items to Check before Troubleshooting
  121
- Troubleshooting Procedures for Electrical Equipment
  121
- Troubleshooting Procedure (if the Air-Conditioner Runs)
  122
- Self-Diagnosis Table
  123
- Explanation of Terms
  124
- Service Mode (Trouble Mode Access Function)
  124
- Service Mode Display Procedure
  124
- Self-Diagnosis Data
  125
- Stop Data
  126
- Error Code, Stop Code Table
  127
- Operation Mode, Fan Speed Mode Information Tables
  128
- Temperatare Information
  129
- Discharge Pipe Sensor Temperature
  130
- Service Data Record Form
  131
- Indoor Fan Motor Error
  132
- Inspection Procedures Corresponding to Detail of Trouble
  132
- Sensor Error
  132
- Sensor Temperature Characteristics
  132
- Error of Signal Transmission
  133
- Checking the Indoor Electrical Equipment
  134
- Humidity Sensor Operation
  134
- Indoor Fan Motor Check Procedure
  134
- Phenomenon Observed after Short-Circuit, Wire Breakage on Sensor
  134
- Fan Motor Resistance Check
  135
- Indoor Unit PCB Output Check
  135
- How to Make Sure of Wireless Remote Control
  136
- Inspection Procedure for Blown Fuse on the Indoor Unit PCB
  136
- Ceiling Cassette-4 Way Type (FDT)
  137
- Electrical Wiring
  137
- Ceiling Casette-4 Way Compact Type (FDTC)
  138
- Duct Connected-High Static Pressure Type (FDU)
  139
- Duct Connected-Low / Middle Static Pressure Type (FDUM)
  140
- Ceiling Suspended Type (FDE)
  142
- Wall Mounted Type (SRK)
  143
- Piping System
  145
- Preset Point of the Protective Devices
  146
- V Multi System
  148

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Mitsubishi Heavy Industries FDC71VNX-W Service Manual (150 pages)

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