Daikin EWAQ050BAW Service Manual

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ESIE11-05

Service Manual

Small inverter chillers

EWAQ016BAW EWYQ016BAW

EWAQ021BAW EWYQ021BAW

EWAQ025BAW EWYQ025BAW

EWAQ032BAW EWYQ032BAW

EWAQ040BAW EWYQ040BAW

EWAQ050BAW EWYQ050BAW

EWAQ064BAW EWYQ064BAW

Table of Contents

Table of Contents3
Table of Contents4
Introduction7
Safety Cautions7
Caution in Repair7
Cautions Regarding Products after Repair9
Inspection after Repair10
Using Icons10
Using Icons List11
Part 1 - General Outline12
- Option Specifications13
- Technical Specifications13
- Electrical Specifications13
- Nomenclature13
- Operation Range13
- Refrigerant Circuit14
Esie1116
- EWYQ021BA, 025BA, 040BA Module, 050BA Module17
- EWYQ032BA, 064BA Module19
- Front View20
- Functional Parts Layout Outdoor Unit20
- Top View20
- Refrigerant Flow for each Operation Mode23
- Heating Operation24
- Ewa/Yq016Ba, 021Ba, 025Ba, 032Ba29
- Water Circuit29
  - Legend30
  - Notes30
- EWA/YQ040BA, 050BA, 064BA Module31
- Pressure Drop33
- Hydrobox Wiring36
- Wiring Diagram36
- Switch Box Layout38
- Wiring Diagram - Three Phase (3N~)39
- Wiring Outdoor40
- Field Wiring49
Part 2 - Functional Description50
- Function General51
- Symbol51
- Operation Mode52
- Basic Control53
- List of Functions in Normal Operation53
- Normal Operation53
- Compressor PI Control54
- Compressor Step Control54
- Electronic Expansion Valve PI Control55
- Subcooling Electronic Expansion Valve EV2 Control55
- Step Control of Outdoor Unit Fans56
- Outdoor Unit Fan Control in Cooling Operation57
- Special Control58
- Startup Control58
  - Startup Control in Cooling Operation58
  - Startup Control in Heating Operation59
- Defrosting Operation60
- Pump-Down Residual Operation61
  - Pump-Down Residual Operation in Cooling Operation61
  - Pump-Down Residual Operation in Heating Operation61
  - Crankcase Heater Control62
  - Restart Standby62
- Standby62
- Stopping Operation63
- When System Is in Stop Mode (Normal Operation Stop)63
- High Pressure Protection Control64
- Protection Control64
- Low Pressure Protection Control65
- Discharge Pipe Protection Control66
  - INV Compressor66
  - STD Compressor66
  - Inverter Fin Temperature Control67
  - Inverter Overcurrent Protection Control67
- Inverter Protection Control67
- STD Compressor Overload Protection68
- Emergency Operation69
- Other Control69
- Restrictions for Emergency Operation69
- Demand Operation72
- Freeze Prevention73
- Outline of Control (Hydrobox)73
- Thermostat Control74
- Flow Control75
  - Unit State DEFROST75
  - Unit State OPERATION LED on75
  - Unit State RUN COOLING/HEATING75
- Field Setting from Outdoor Unit76
- Setting at Replacement by Spare PCB78
- Initial Conditions of Dip Switches78
- Setting Mode 1 (H1P Off)79
- Setting by BS Button Switches79
- Monitor Mode (H1P Blinks)80
Setting Mode 181
Setting Mode 282
- Monitor Mode86
- Setting of Low Noise Operation and Demand Operation87
- Setting of Refrigerant Recovery Mode92
- Setting of Vacuuming Mode93
- Remote Controller94
- Temperature Read out for Remote Control94
- Field Setting95
- Weekly Schedual108
Part 3 - Troubleshooting110
Symptom-Based Troubleshooting112
Malfunction Codes and Description115
Malfunction Code Indication by Outdoor Unit PCB117
A1121
Error Codes121
- A6122
- A9123
- Ae125
- Aj126
- C1127
- C4128
- C9129
- Ca130
- Cj131
- E1132
- E6139
- E7140
- L8161
- L9163
- Lc165
- Pj171
- U0172
- U1173
- U2174
- U4178
- U5179
- U8180
- Ua181
- Uf182
- Uh183
Part 4 - Service Procedure192
- Ew*Q016Ba193
- List of Electrical and Functional Parts193
- EW*Q021BA, 025BA, 040BA Module, 050BA Module194
- EW*Q032BA, 064BA Module195
- Thermistor Resistance / Temperature Characteristics196
- Pressure Sensor198
- Checking Failures in Power Semiconductors Mounted on Inverter PCB199
- Method of Checking the Inverter's Power Transistors and Diode Modules199
  - Diode Module Checking200
  - Power Module Checking200
- Ekrp1Aht201
- Options201
- Dta104A62204
- Procedure for Software Upload Hydrobox209
- What Do You Need209
- Software Upload Procedure210
Part 5 - Commissioning and Test Run218
- Installation Process219
- Test Run219
- Check Work Prior to Turn Power Supply on220
- Procedure and Outline220
- Operation When Power Is Turned on223
- When Turning on Power First Time223
- Hydrobox or Outdoor Unit PCB Has Been Changed223
- Part 6 - Maintenance224
- Maintenance of the Main Parts226
- Preventive Maintenance226
- Unit Casing226
- Compressor226
- Index227

Other manuals for Daikin EWAQ050BAW

Installation And Operation Manual48 pages

Questions and Answers:

J
Janice FullerAug 19, 2025
What to do if Daikin EWAQ050BAW Chiller shows error code E3?
- A
  Alejandro BallardAug 20, 2025
  If your Daikin Chiller displays error code E3, it indicates a high-pressure error, possibly due to air in the circuit. Ensure the circuit is filled with water and that there is no air inside. Also, confirm that water flow is possible by opening all valves and verifying the water filter isn't blocked. Additionally, ensure all refrigerant stop valves are open. If the issue persists, contact your local dealer.
D
Douglas YoungAug 22, 2025
How to fix Daikin EWAQ050BAW Chiller error code U1?
- L
  Laura PowellAug 22, 2025
  Daikin Chiller error code U1 means the phases of the power to the unit are reversed. To fix this, exchange two of the three phases (L1, L2, L3) to make a positive phase connection.
T
Travis PerezAug 23, 2025
What to do if Daikin EWAQ050BAW Chiller displays error code A6?
- J
  James RodriguezAug 25, 2025
  Daikin Chiller error code A6 indicates a malfunction in the water circuit. Ensure water flow is possible by opening all valves in the circuit and force clean water through the unit.
A
Andrea WrightAug 26, 2025
What does Daikin EWAQ050BAW Chiller error code AE mean?
- J
  John MosleyAug 26, 2025
  Daikin Chiller error code AE is a water system warning. To address this, check the filter, ensure all valves are open, and contact your local dealer if the problem continues.
E
Erika FletcherAug 27, 2025
What causes Daikin EWAQ050BAW error code U2?
- M
  Megan KellyAug 27, 2025
  Daikin Chiller error code U2 indicates a power supply error. Check the wiring connections and contact your local dealer.
S
Sara PittmanAug 29, 2025
What does Daikin EWAQ050BAW error code A9 mean?
- H
  Howard MirandaAug 29, 2025
  Daikin Chiller error code A9 indicates an R410A expansion valve error. Check the wiring connections and contact your local dealer.
M
Matthew MoraSep 1, 2025
What does Daikin EWAQ050BAW error code C4 mean?
- V
  Virginia HernandezSep 1, 2025
  Daikin Chiller error code C4 indicates an R410A liquid thermistor error. Check the wiring connections and contact your local dealer.
S
Sandra MillerSep 2, 2025
What to do for Daikin EWAQ050BAW Chiller error code J7?
- K
  Kelly BernardSep 3, 2025
  Daikin Chiller error code J7 indicates an R410A suction thermistor error. Check the wiring connections and contact your local dealer.
M
Megan ColemanSep 4, 2025
What does Daikin Chiller error code C9 mean?
- R
  Robert PerezSep 4, 2025
  Daikin Chiller error code C9 indicates a returning water thermistor error. Check the wiring connections and contact your local dealer.
A
Amber HernandezSep 7, 2025
What does Daikin EWAQ050BAW error code CA mean?
- C
  Crystal DownsSep 7, 2025
  Daikin Chiller error code CA is a heating leaving water thermistor error. Check the wiring connections and contact your local dealer.

Daikin EWAQ050BAW Specifications

General

Model	EWAQ050BAW
Category	Chiller
Cooling Capacity	50 kW
Power Supply	380-415V, 3Ph, 50Hz
Refrigerant	R-410A
Compressor Type	Scroll
Weight	280 kg

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