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Daikin Manuals
Air Conditioner
RXMQ4 5 6PVE
Service manual
Daikin RXMQ4·5·6PVE Service Manual
R-410a heat pump 50/60hz cooling only
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Introduction
Safety Cautions
Caution in Repair
Cautions Regarding Products after Repair
Inspection after Repair
Using Icons
Using Icons List
Preface
Part 1 General Information
Model Names of Indoor/Outdoor Units
External Appearance
Indoor Units
Capacity Range
Part 2 Specifications
Outdoor Units
Indoor Units
Ceiling Suspended Type
Wall Mounted Type
Floor Standing Type
Part 3 List of Electrical and Functional Parts
List of Electrical and Functional Parts
Outdoor Unit
Indoor Unit
Part 4 Refrigerant Circuit
Refrigerant Circuit
Rx(Y)Mq4 / 5 / 6P
Functional Parts Layout
Rx(Y)Mq4 / 5 / 6P
Part 5 Function
Operation Mode
Basic Control
Normal Operation
Compressor PI Control
Electronic Expansion Valve PI Control
Cooling Operation Fan Control
Special Control
Startup Control
Oil Return Operation
Defrosting Operation
Pump-Down Residual Operation
Restart Standby
Stopping Operation
Protection Control
High Pressure Protection Control
Low Pressure Protection Control
Discharge Pipe Protection Control
Inverter Protection Control
Other Control
Demand Operation
Heating Operation Prohibition
Outline of Control (Indoor Unit)
Drain Pump Control
Remote Controller
Louver Control for Preventing Ceiling Dirt
Thermostat Sensor in Remote Controller
Freeze Prevention
View of Operations of Swing Flaps
Swing Flaps
Electronic Expansion Valve Control
Hot Start Control (in Heating Operation Only)
Part 6 Test Operation
Test Operation
Procedure and Outline
Check Operation
Operation When Power Is Turned on
Outdoor Unit PC Board Layout
Field Setting
Field Setting from Remote Controller
Simplified Remote Controller
Detailed Explanation of Setting Modes
Group No. Setting Example
Contents of Control Modes
Field Setting from Outdoor Unit
Image of Operation
Part 7 Troubleshooting
Symptom-Based Troubleshooting
Troubleshooting by Remote Controller
The INSPECTION / TEST Button
Self-Diagnosis by Wired Remote Controller
Self-Diagnosis by Wireless Remote Controller
Operation of the Remote Controller's Inspection / Test Operation Button
Remote Controller Service Mode
Remote Controller Self-Diagnosis Function
Troubleshooting by Indication on the Remote Controller
A0" Indoor Unit: Error of External Protection Device
A1" Indoor Unit: PC Board Defect
PC Board Defect
A3" Indoor Unit: Malfunction of Drain Level Control System (33H)
A6" Indoor Unit: Fan Motor (M1F) Lock, Overload
Fan Motor (M1F) Lock, Overload
A7" Indoor Unit: Malfunction of Swing Flap Motor (MA)
A9" Indoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (20E)
AF" Indoor Unit: Drain Level above Limit
AJ" Indoor Unit: Malfunction of Capacity Determination Device
C4" Indoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger
Malfunction of Thermistor (R2T) for
3.10 " C5 " Indoor Unit
Malfunction of Thermistor (R3T) for Gas Pipes
C5" Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes
3.11 " C9 " Indoor Unit
C9" Indoor Unit: Malfunction of Thermistor (R1T) for Suction Air
3.12 " CA " Indoor Unit
Malfunction of Thermistor for Discharge Air
CA" Indoor Unit: Malfunction of Thermistor for Discharge Air
CJ" Indoor Unit: Malfunction of Thermostat Sensor in
In Remote Controller
Remote Controller
E1" Outdoor Unit: PC Board Defect
PC Board Defect
E3" Outdoor Unit: Actuation of High Pressure Switch
Actuation of High Pressure Switch
E4" Outdoor Unit: Actuation of Low Pressure Sensor
Actuation of Low Pressure Sensor
E5" Compressor Motor Lock
Compressor Motor Lock
E7" Malfunction of Outdoor Unit Fan Motor
Malfunction of Outdoor Unit Fan Motor
E9" Outdoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E, Y3E)
F3" Outdoor Unit: Abnormal Discharge Pipe Temperature
F6" Outdoor Unit: Refrigerant Overcharged
Outdoor Unit: Refrigerant Overcharged
3.22 " H9 " Outdoor Unit
H9" Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air
3.23 " J3 " Outdoor Unit
Malfunction of Discharge Pipe Thermistor (R2T)
J3" Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R2T)
3.24 " J5 " Outdoor Unit
Suction Pipe 1, 2
J5" Outdoor Unit: Malfunction of Thermistor (R3T, R5T) for Suction Pipe 1, 2
J6" Outdoor Unit: Malfunction of Thermistor (R4T) for
Outdoor Unit Heat Exchanger
3.26 " J7 " Outdoor Unit
Malfunction of Thermistor (R7T) for
Outdoor Unit Liquid Pipe
J9" Outdoor Unit: Malfunction of Subcooling Heat
Gas Pipe Thermistor (R6T)
Exchanger Gas Pipe Thermistor (R6T)
3.28 " JA " Outdoor Unit
Malfunction of High Pressure Sensor
JA" Outdoor Unit: Malfunction of High Pressure Sensor
JC" Outdoor Unit: Malfunction of Low Pressure Sensor
Malfunction of Low Pressure Sensor
L1" Outdoor Unit: Malfunction of PC Board
Malfunction of PC Board
3.31 " L4 " Outdoor Unit
Temperature Rise
L4" Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise
L5" Outdoor Unit: Inverter Compressor Abnormal
Inverter Compressor Abnormal
L8" Outdoor Unit: Inverter Current Abnormal
Inverter Current Abnormal
L9" Outdoor Unit: Inverter Start up Error
Inverter Start up Error
3.35 " LC " Outdoor Unit
Inverter and Control PC Board
3.36 " P1 " Outdoor Unit
P1" Outdoor Unit: High Voltage of Capacitor in Main Inverter Circuit
P4" Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise Sensor
3.38 " UO " Outdoor Unit
Or Electronic Expansion Valve Failure
Shortage or Electronic Expansion Valve Failure
U2" Power Supply Insufficient or Instantaneous Failure
Power Supply Insufficient or Instantaneous Failure
U3" Check Operation Not Executed
Check Operation Not Executed
Malfunction of Transmission between Indoor Units and Outdoor Units
Outdoor Units
U5" Malfunction of Transmission between Remote Controller
And Indoor Unit
Indoor Unit
Controller and Indoor Unit
Malfunction of Transmission between Main and Sub Remote Controllers
Sub Remote Controllers
Malfunction of Transmission between Indoor and Outdoor Units in the same System
Outdoor Units in the same System
UA" Excessive Number of Indoor Units
Excessive Number of Indoor Units
UC" Address Duplication of Central Remote Controller
Address Duplication of Central Remote Controller
Malfunction of Transmission between Central Remote Controller and Indoor Unit
UE" Malfunction of Transmission between Central Remote Controller and Indoor Unit
UF" System Is Not Set yet
System Is Not Set yet
UH" Malfunction of System, Refrigerant System Address Undefined
Troubleshooting by Indication on the Centralized Remote Controller
UE" Malfunction of Transmission between Centralized Remote
Controller and Indoor Unit
Remote Controller and Indoor Unit
M1" PC Board Defect
PC Board Defect
Controllers for Centralized Control
M8" Malfunction of Transmission between Optional
Malfunction of Transmission between Optional Controllers for Centralized Control
Centralized Control
Improper Combination of Optional Controllerslers for Centralized Controllers
MC" Address Duplication, Improper Setting
Troubleshooting by Indication on the Unified ON/OFF Controller
Operation Lamp Blinks
Display "Under Host Computer Integrate Control" Blinks (Repeats Single Blink)
Display "Under Host Computer Integrate Control" Blinks
Display "Under Host Computer Integrate Control" Blinks (Repeats Double Blink)
(Repeats Double Blink)
Troubleshooting
Part 8 Appendix
Piping Diagrams
Outdoor Unit
Indoor Unit
Wiring Diagrams
Outdoor Unit
Cooling Only
Field Wiring
Indoor Unit
Option List
Option List of Controllers
Option List of Outdoor Unit
Example of Connection
Thermistor Resistance / Temperature Characteristics
Pressure Sensor
Method of Replacing the Inverter's Power Transistors Modules
Part 9 Precautions for New Refrigerant (R-410A)
Precautions for New Refrigerant (R-410A)
Outline
Refrigerant Cylinders
Service Tools
Index
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1
Part 1 General Information
2
Model Names of Indoor/Outdoor Units
3
Outdoor Units
4
Outdoor Unit
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Si34 - 603
RX(Y)MQ4·5·6PVE
R-410A
Heat Pump 50/60Hz
Cooling Only 50/60Hz
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Table of Contents
Troubleshooting
Part 7 Troubleshooting
122
Symptom-based Troubleshooting
124
Troubleshooting by Remote Controller
127
Troubleshooting by Indication on the Remote Controller
141
Troubleshooting by Indication on the Centralized Remote Controller
201
Troubleshooting by Indication on the Unified ON/OFF Controller
207
troubleshooting
213
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