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Manuals
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York Manuals
Air Conditioner
DHM24CMB21S
Service manual
York DHM24CMB21S Service Manual
Inverter-driven air conditioning units
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Service Manual
Important Notice
Product Inspection Upon Arrival
Table of Contents
Important Safety Instructions
General Precautions
Installation Precautions
Refrigerant Precautions
Electrical Precautions
Units and Features
Specifications
Construction Views
Refrigerant System Diagram
Schematic Diagram
Electrical Data
Electrical Wiring
Printed Circuit Board
Top View
Bottom View
Function and Control
Basic Functions of the System
Cooling Mode
Dry Mode
Heating Mode
Protection Function
Fan Mode
Mode Conflict Protection of Indoor Unit
Overload Protection Function
Communication Malfunction
Compressor High-Pressure Protection
Compressor Overload Protection
Compressor Phase Lock-Out Protection
Overcurrent Protection
Ipm Protection
Function Control
Overload Protection
High Exhaust Temperature Protection
Other Functions
System High-Pressure Protection
System Low-Pressure Protection
Refrigerant Recovery
Troubleshooting
Malfunction Indicator
Malfunction Checking and Elimination
IPM Protection Malfunction
Main Checking Point
Energize the Unit
PFC Protection Malfunction
Capacity Charging Malfunction
Energize the Unit and Wait for 1 Min
Anti-High Temperature and Overload Malfunction
Temperature Sensor Malfunction
Start Failure Malfunction
Energize and Start the Unit
Communication Malfunction of some Indoor Units
All the Indoor Units Appear Communication Malfunction
Compressor Overload, Diacharge Protection Malfunction
Compressor Desynchronizing Malfunction
The Unit Appears Desynchronizing as Soon as Energizing and Starting
Check before Contacting Service Center
Problem Handling
Malfunction Display: E1 Compressor High Pressure Protection
Malfunction Display: E3 Compressor Low Pressure Protection
Malfunction Display: E4 Compressor Exhaust High Temperature Protection
Malfunction Display: E5 Compressor Overheat
Malfunction Display: E9 Full Water Protection
Malfunction Display: F2 Failure of Evaporator Temp. Sensor
Malfunction Display: F3 Failure of Outdoor Ambient Sensor
Malfunction Display: F5 Failure of Exhaust Temp. Sensor
Removal Procedures
Before Disassembly
Remove Top Panel
Remove Front Side Plate
Disassembly and Assembly of Outer Casing
Disassemble the Cover Plate
Disassemble the Front Panel
Disassemble the Panel on the Right Side
Remove the Grille
Disassemble the Outer Casing
Disassemble the Fan Blades
Disassembly and Assembly of Compressor
Disconnect the Power Cord
Disassemble the Pipeline Connected with Compressor
Disassembly and Assembly of 4-Way Valve
Remove the 4-Way Valve Coil
Disassembly and Assembly of Electronic Expansion Valve
Disassembly and Assembly of Vapor Liquid Separator
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Service Manual
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Installation Precautions
3
Refrigerant Precautions
4
Electrical Precautions
5
Specifications
6
Troubleshooting
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Service Manual
"M" SERIES
INVERTER-DRIVEN
AIR CONDITIONING
UNITS
Type
DHM18CMB21S
DHM24CMB21S
OUTDOOR UNIT
DHM30CMB21S
DHM36CMB21S
DHM42CMB21S
READ AND UNDERSTAND
THIS MANUAL BEFORE
USING THIS INVERTER-
DRIVEN AIR CONDITIONING
UNIT. KEEP THIS MANUAL
FOR FUTURE REFERENCE.
Model
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