Daikin ERQ User Manual

ESIE09-05 Test Operation
Test Operation 89
1.1.6 Confirmation on Normal Operation
• Conduct normal unit operation after the check operation has been completed.
(When outdoor air temperature is 24°CDB or higher, the unit can not be operated with
heating mode. See the installation manual attached.)
• Confirm that the AHU/outdoor units can be operated normally.
(When an abnormal noise due to liquid compression by the compressor can be heard, stop
the unit immediately, and turn on the crankcase heater to heat up it sufficiently, then start
operation again.)
• Operate AHU one by one to check that the corresponding outdoor unit operates.
• Confirm that the AHU discharges cold air (or warm air).
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Daikin ERQ Specifications

General

Brand	Daikin
Model	ERQ
Category	Heat Pump
Language	English

Summary

Part 1 General Information

1. Model Names of Outdoor Units, Control Box and Expansion Valve Kit

Part 2 Specifications

Part 3 List of Electrical and Functional Parts

Part 4 Refrigerant Circuit

Part 5 Function

4. Protection Control

4.1 High Pressure Protection Control

Details on high pressure protection measures.

4.2 Low Pressure Protection Control

Details on low pressure protection measures.

4.3 Discharge Pipe Protection Control

Protection control for discharge pipe temperature.

4.4 Inverter Protection Control

Protection controls related to the inverter.

6.2 Freeze Prevention

6.3 Hot Start Control (In Heating Operation Only)

Part 6 Control Box EKEQ - CBV3

Part 7 Test Operation

Part 8 Installation and Operation Manual

Part 9 Troubleshooting

1. Symptom-based Troubleshooting

Troubleshooting guide based on observed symptoms.

2. Troubleshooting by Remote Controller

Troubleshooting procedures using the remote controller.

2.1 The INSPECTION / TEST Button

2.2 Self-diagnosis by Wired Remote Controller

2.3 Remote Controller Service Mode

2.4 Remote Controller Self-Diagnosis Function

3. Troubleshooting by Indication on the Remote Controller

Troubleshooting based on remote controller display codes.

3.1 “A0” AHU: Error of External Protection Device

Troubleshooting AHU 'A0' error: External Protection Device.

3.2 “A1” AHU: PC Board Defect

Troubleshooting AHU 'A1' error: PC Board Defect.

3.3 “A6” AHU: Fan Motor (M1F) Lock, Overload

Troubleshooting AHU 'A6' error: Fan Motor Lock/Overload.

3.4 Abnormal Power Supply Voltage

Troubleshooting abnormal power supply voltage.

3.5 “A9” AHU: Malfunction of Moving Part of Electronic Expansion Valve (Y1E)

Troubleshooting AHU 'A9' error: Electronic Expansion Valve part malfunction.

3.6 “AJ” AHU: Malfunction of Capacity Determination Device

Troubleshooting AHU 'AJ' error: Capacity Determination Device.

3.7 “C1” AHU: Failure of Transmission (Between AHU PC Board and Fan PC Board)

Troubleshooting AHU 'C1' error: Transmission Failure.

3.8 “C4” AHU: Malfunction of Thermistor (R2T) for Heat Exchanger

Troubleshooting AHU 'C4' error: Heat Exchanger Thermistor malfunction.

3.9 “C5” AHU: Malfunction of Thermistor (R3T) for Gas Pipes

Troubleshooting AHU 'C5' error: Gas Pipes Thermistor malfunction.

3.10 “C6” AHU: Failure of Combination (Between AHU PC Board and Fan PC Board)

Troubleshooting AHU 'C6' error: Combination Failure.

3.11 “C9” AHU: Malfunction of Thermistor (R1T) for Suction Air

Troubleshooting AHU 'C9' error: Suction Air Thermistor malfunction.

3.12 “CA” AHU: Malfunction of Thermistor for Discharge Air

Troubleshooting AHU 'CA' error: Discharge Air Thermistor malfunction.

3.13 “CC” AHU: Malfunction of Humidity Sensor System

Troubleshooting AHU 'CC' error: Humidity Sensor System malfunction.

3.14 “CJ” AHU: Malfunction of Thermostat Sensor in Remote Controller

Troubleshooting AHU 'CJ' error: Remote Controller Thermistor malfunction.

3.15 “E1” Outdoor Unit: PC Board Defect

Troubleshooting Outdoor Unit 'E1' error: PC Board Defect.

3.16 “E3” Outdoor Unit: Actuation of High Pressure Switch

Troubleshooting Outdoor Unit 'E3' error: High Pressure Switch actuation.

3.17 “E4” Outdoor Unit: Actuation of Low Pressure Sensor

Troubleshooting Outdoor Unit 'E4' error: Low Pressure Sensor actuation.

3.18 “E5” Inverter Compressor Motor Lock

Troubleshooting Outdoor Unit 'E5' error: Inverter Compressor Motor Lock.

3.19 “E7” Malfunction of Outdoor Unit Fan Motor

Troubleshooting Outdoor Unit 'E7' error: Fan Motor malfunction.

3.20 “E9” Outdoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (Y1E, Y3E)

Troubleshooting Outdoor Unit 'E9' error: Electronic Expansion Valve part malfunction.

3.21 “F3” Outdoor Unit: Abnormal Discharge Pipe Temperature

Troubleshooting Outdoor Unit 'F3' error: Abnormal Discharge Pipe Temperature.

3.22 “F6” Outdoor Unit: Refrigerant Overcharged

Troubleshooting Outdoor Unit 'F6' error: Refrigerant Overcharged.

3.23 “H9” Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air

Troubleshooting Outdoor Unit 'H9' error: Outdoor Air Thermistor malfunction.

3.24 “J3” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R2T)

Troubleshooting Outdoor Unit 'J3' error: Discharge Pipe Thermistor malfunction.

3.25 “J5” Outdoor Unit: Malfunction of Thermistor (R3T, R5T) for Suction Pipe 1, 2

Troubleshooting Outdoor Unit 'J5' error: Suction Pipe Thermistor malfunction.

3.26 “J6” Outdoor Unit: Malfunction of Thermistor (R6T)

3.27 “J7” Outdoor Unit: Malfunction of Thermistor (R7T) for Outdoor Unit Liquid Pipe

3.28 “J9” Outdoor Unit: Malfunction of Thermistor (R4T)

3.29 “JA” Outdoor Unit: Malfunction of High Pressure Sensor

3.30 “JC” Outdoor Unit: Malfunction of Low Pressure Sensor

4. Troubleshooting by Indication on the Unified ON/OFF Controller

4.1 Operation Lamp Blinks

4.2 Display “Under Host Computer Integrate Control” Blinks (Repeats Single Blink)

4.3 Display “Under Host Computer Integrate Control” Blinks (Repeats Double Blink)

Part 10 Appendix

Part 11 Precautions for New Refrigerant (R-410A)

1. Precautions for New Refrigerant (R-410A)