Table Of Contents - Mitsubishi Electric SUZ-KA24NAHZ Service Manual

Table of Contents

Table Of Contents1
Reference Manual2
Safety Precaution2
Preparation Before The Repair Service2
Precautions During The Repair Service2
Cautions Related To New Refrigerant3
Use New Refrigerant Pipes3
Handle Tools With Care3
Use The Specified Refrigerant Only3
Cautions For Service4
Additional Refrigerant Charge4
When Charging Directly From Cylinder4
Service Tools4
Cautions For Refrigerant Piping Work5
Thickness Of Pipes5
Dimensions Of Flare Cutting And Flare Nut5
Diagram Below: Piping Diameter And Thickness5
Features6
Chargeless System6
Specifications7
Data9
Refilling Refrigerant Charge9
Compressor Technical Data9
Noise Criterion Curves10
Standard Operation Data11
Representative Matching12
Outlines And Dimensions13
Suz-Ka24Nahz13
Suz-Ka30Nahz14
Suz-Ka36Nahz14
Wiring Diagram15
Wiring Specifications17
Indoor Unit Power Supplied From Outdoor Unit17
Simultaneous Twin System17
Separate Indoor Unit/Outdoor Unit Power Supplies18
1:1 System18
Indoor – Outdoor Connecting Cable19
Refrigerant System Diagram20
Refrigerant Collecting (Pump Down)22
Start And Finish Of Test Run22
Troubleshooting23
The Trouble Is Reoccurring23
The Trouble Is Not Reoccurring23
Check Point Under Test Run24
Before Test Run24
Error Information24
Errors Detected By Indoor Unit25
Self-Diagnosis Action Table26
Abnormalities Detected When The Power Is Turned On26
63H Connector Open27
Miswiring Of Indoor/Outdoor Unit Connecting Wire27
Startup Time Over27
High Pressure28
High Discharge Temperature28
Abnormal If Th4 Exceeds 257˚F28
Abnormal If Discharge Superheat28
Open/Short Circuit Of Outdoor Unit29
Open/Short Of Outdoor Unit Thermistors29
Temperature Of Heatsink29
Power Module29
Outdoor Fan Motor30
Too Low Superheat Due To Low Discharge Temperature30
Overvoltage Error30
Undervoltage Error30
Abnormal Power Synchronous Signal31
Pfc Error31
Compressor Overcurrent Interruption31
Current Sensor Error31
Abnormal Low Pressure (63L Worked)32
Remote Controller Transmission Error(E0)/Signal Receiving Error(E4)32
Remote Controller Control Board32
Indoor/Outdoor Unit Communication33
Non Defined Check Code34
Serial Communication Error34
Pipe Temperature34
Cooling Mode34
Abnormal Refrigerant Circuit35
Address Duplicate Definition36
Hardware Error Of Transmission Processor36
Bus Busy36
Communication Error With Communication Processor36
No Ack Signal37
Troubleshooting By Inferior Phenomena39
M-Net No Response39
"Please Wait" Is Kept Being Displayed on the Remote Controller41
Nothing Is Displayed On The Remote Controller 142
Nothing Is Displayed On The Remote Controller 243
Nothing Is Displayed On The Remote Controller 344
Before Repair45
Frequent Calls From Customers45
The Room Cannot Be Cooled Or Heated Sufficiently46
How To Check The Parts49
Fan Motor(Mf1, Mf2)49
Solenoid Valve Coil49
Motor For Compressor49
Check Method Of Dc Fan Motor50
Self Check50
Fuse Check50
Wiring Contact Check50
How To Check The Components51
Thermistor Feature Chart51
Low Temperature Thermistors51
Medium Temperature Thermistor51
Linear Expansion Valve52
Operation Summary Of The Linear Expansion Valve52
Output Pulse Signal And The Valve Operation52
Linear Expansion Valve Operation52
How To Attach And Detach The Coil Of Linear Expansion Valve54
How To Detach The Coil54
How To Attach The Coil54
Emergency Operation55
Emergency Operation Procedure55
Releasing Emergency Operation55
Operation Data During Emergency Operation56
Discharge Superheat (Shd)56
Degree Of Subcooling (Sc)56
Test Point Diagram57
Outdoor Controller Circuit Board57
Outdoor Power Circuit Board58
Brief Check Of Power Module58
Check Power Module58
Check Of Diode Circuit58
Function Of Switches60
Function Of Connector61
Special Function62
Low-Level Sound Priority Mode (Local Wiring)62
On Demand Control (Local Wiring)62
Display Function Of Inspection For Outdoor Unit63
Normal Condition63
Abnormal Condition63
Outdoor Unit Operation Monitor Function65
Digital Indicator Led1 Working Details65
When The Display Blinks65
Pipe Temperature / Liquid(Th3)66
Discharge Temperature (Th4)66
Output Step Of Outdoor Fan66
Lev-A Opening Pulse66
Error History (1) (Latest)67
Error History (2)67
Thermostat On Time67
Test Run Elapsed Time67
The Number Of Connected Indoor Units68
Capacity Setting Display68
Outdoor Unit Setting Information68
Indoor Room Temperature (Th1)68
Indoor Setting Temperature69
Outdoor Pipe Temperature/2-Phase (Th6)69
Outdoor Outside Temperature (Th7)69
Outdoor Heatsink Temperature (Th8)69
Dc Bus Voltage70
Capacity Save70
Error Postponement Code History (2)70
Easy Maintenance Function74
Smooth Maintenance74
Easy Maintenance Information (Unit)74
Guide For Operation Condition75
Checkpoints75
Cool Mode75
Heat Mode75
Function Setting76
Unit Function Setting By The Remote Controller76
Function Selections76
Meaning Of "Function Setting"76
Available Functions And Settings77
Selecting Functions Using The Remote Controller77
Monitoring The Operation Data By The Remote Controller78
Request Code List78
Detail Contents In Request Code82
Relay Output State82
Data Display82
Fan Control State83
Actuator Output State83
Error Content (U9)83
Contact Demand Capacity84
External Input State84
Outdoor Unit – Capacity Setting Display84
Outdoor Unit – Setting Information84
Outdoor Unit Switch Setting Display (Sw1 To Sw10, Except Sw3)85
Indoor Unit – Model Setting Information86
Indoor Unit – Capacity Setting Information86
Wireless Pair No. (Indoor Control Board Side) Setting86
Disassembly Procedure87
Removing The Service Panel And Top Panel87
Removing The Fan Motor (Mf1)87
Removing The Electrical Parts Box87
Removing The Thermistor (Th3) And Thermistor88
Removing The Thermistor88
Removing The 4-Way Valve Coil (21S4)89
Removing The 4-Way Valve89
Removing The Lev89
Removing The High Pressure Switch (63H)90
Removing The Reactor (Dcl)90
Removing The Compressor (Mc)91
Removing The Power Receiver91
Removing The Base Heater92
Removing The Fan Motor (Mf1, Mf2)93
Remote Controller100
Remote Controller Functions100
Controller Interface100
Display101
Full Mode101
Basic Mode101
Menu Structure102
Main Menu102
Main Menu List104
Service Menu110
Maintenance Password Is Required110
Test Run111
Par-Sl97A-E112
Par-Sl100A-E112
Going To The Function Select Mode115
Setting The Unit Number115
Select A Mode115
Selecting The Setting Number115
Error History116
Deleting The Error History116
Resetting The Error History117
Self-Diagnosis117
Malfunction-Diagnosis Method At Maintenance Service118
Remote Controller Check119
Remote Controller Check Results Screen119
Request Code121
Refrigerant Address121
Single Refrigerant System121
Multi Refrigerant System (Group Control)121