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98 Specifications subject to change without notice. 38MGR-04SM

DISASSEMBLY INSTRUCTIONS SIZES 36 AND 48 (CONT)

3 Electrical

parts

How to remove the electrical

parts.

1) Complete steps 5 and 6

from the “Fan Assembly”

section and all the steps

from the “Panel Plate”

section.

2) Disconnect the fan motor

connector (5p,white) from

the IPM board.

IPM board PCB board

DC Fan

Driver board

2) Remove the terminal board

screws (2) and the right-rear

panel screws (15) and then

remove the right-rear panel.

Terminal Board

Screws

Right-rear

panel screws

Right-rear

panel screws

Table of Contents1
Safety Considerations1
Introduction1
Unit Sizes2
Model / Serial Number Nomenclatures2
Specifications3
Dimensions4
- Size 24K5
- Size 30K5
- Size 36K6
- Size 48K7
- Clearances for Multiple Units8
Clearances8
Electrical Data9
Wiring9
- Size 18K 2 Zone10
- Size 24K 3 Zone10
Connection Diagrams10
- Size 30K 4 Zone11
- Size 36K 4 Zone11
- Size 48K 5 Zone12
Automatic Wiring/Piping Correction13
Size 18K14
Wiring Diagrams14
- 36K - 4 Zone Max19
- Wiring Diagram 48K - 5 Zone Max20
- 48K - 5 Zone Max21
Refrigeration Cycle Diagrams22
- Piping and Refrigerant24
- Additional Charge Table Per Zone24
- General Refrigerant Line Sizing24
Refrigerant Lines24
- System Vacuum and Charge25
- Using Vacuum Pump25
- Deep Vacuum Method25
System Evacuation and Charging25
- Electric Control Working Environment26
- Main Protection26
- Compressor Current Limit Protection26
Electronic Function26
- Low Outdoor Ambient Temperature Protection27
- Controls and Functions27
- Outdoor Unit Anti-Freezing Protection27
- Oil Return27
- High Condenser Coil Temperature Protection27
- Heating Mode28
- Defrosting Control28
- Defrosting Conditions28
- Defrosting Actions28
- End Defrosting Action29
- Outdoor Fan Control29
- Cooling Mode29
- Electronic Expansion Valve (EXV) Control29
- Four-Way Valve Control30
- Diagnostic Guides31
- Outdoor Unit Digital Display31
Troubleshooting31
Outdoor Unit Point Function32
Outdoor Unit Digital Display32
- Diagnosis and Solution34
- Indoor Fan Speed Has Been out of Control (E0/E4)34
- Indoor Units Mode Conflict (P5)35
- EEPROM Parameter Error (EO/E4)36
- EEPROM Chip36
- Communication Malfunction between the Indoor and Outdoor Units (E2/E1)37
- Test the DC Voltage38
- IPM (for Dual/Tri-Zone)38
- IPM for Four or Five Zone39
- Main Board39
- Zero Crossing Detection Error Diagnosis and Solution (E2)40
- IPM Board (for 2-Zone/3-Zone)45
- Bridge Rectifier (for 2-Zone/3-Zone)45
- Bridge Rectifier (for 2-Zone/3-Zone) and IPM Module46
- IPM Board (for 4-Zone)46
- Bridge Rectifier (for 5-Zone)47
- IPM Module (for 5 - Zone)47
- PFC Module Protection Error Diagnosis and Solution (E6)48
- Inductance49
- Outdoor Fan Speed Has Been out of Control (E8)50
- DC Fan Motor (Control Chip Is Inside Fan Motor)51
- Test the Voltage51
- Temperature Protection of Compressor Top) Error (PO)52
- High Pressure Protection Error (P1)54
- Low Pressure Protection Error (P2)56
- Current Protection of Compressor Error (P3)58
- Temperature Protection of Compressor Discharge Error (P4)60
- High Temperature Protection of Condenser Error (P5)61
- IPM Module Protection Error (P6)62
- Temperature Sensor Resistance Value (C-K)64
Appendices64
- Unit C Discharge Temperature Sensor65
- Compressor Check66
- Measure the Resistance66
- IPM Continuity Check67
- AC Fan Motor67
- Resistance Value67
- 4-Way Valve68
- Resistance to EXV Coil69
- EXV Check69
- Disconnect the Connectors69
Disassembly Instructions Size 1872
- How to Remove the Reactor78
- How to Remove the 4-Way Valve78
- How to Remove the Expansion Valve79
- How to Remove the Panel Plate80
Disassembly Instructions Size 2480
- How to Remove the Fan Assembly83
- How to Remove the Electrical Parts84
- How to Remove the Compressor86
Disassembly Instructions Size 3089
Disassembly Instructions Sizes 36 and 4896

Brand	Carrier
Model	38MGRQ24C 3 Series
Category	Air Conditioner
Language	English

Carrier 38MGRQ24C 3 Series User Manual

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Carrier 38MGRQ24C 3 Series Specifications

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