Daikin EGSQH10S18AA9W User manual

Service
Manual
Ground source heat pump
EGSQH10S18AA9W
ESIE13-03
Version 2.0

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The present publication is drawn up by way of information only and does not constitute an offer binding upon Daikin Europe N.V..
Daikin Europe N.V. has compiled the content of this publication to the best of its knowledge. No express or implied warranty is
given for the completeness, accuracy, reliability or fitness for particular purpose of its content and the products and services
presented therein. Specifications are subject to change without prior notice. Daikin Europe N.V. explicitly rejects any liability for
any direct or indirect damage, in the broadest sense, arising from or related to the use and/or interpretation of this publication. All
content is copyrighted by Daikin Europe N.V..

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Table of contents
Part 1. Introduction ....................................................................................................................9
1. Version log ....................................................................................................................................................9
2. Safety precautions ........................................................................................................................................9
2.1. Meaning of symbols .......................................................................................................................................... 9
2.2. Warnings ......................................................................................................................................................... 10
2.3. Cautions .......................................................................................................................................................... 11
2.4. Information ...................................................................................................................................................... 12
3. General operation of ground source heat pump .........................................................................................13
4. How to use this book ...................................................................................................................................15
4.1. Interactive information flow .............................................................................................................................. 15
4.2. Parts of the book ............................................................................................................................................. 16
4.2.1. The introduction chapter ............................................................................................................................. 16
4.2.2. The troubleshooting chapter ....................................................................................................................... 16
4.2.3. The repair chapter ....................................................................................................................................... 16
4.2.4. The maintenance chapter ........................................................................................................................... 16
4.2.5. Appendices ................................................................................................................................................. 16
4.3. Contact information ......................................................................................................................................... 16
Part 2. Troubleshooting ...........................................................................................................17
1. Error codes .................................................................................................................................................17
1.1. How to retrieve error codes ............................................................................................................................. 17
1.2. How to reset error codes ................................................................................................................................. 18
1.3. History of error codes ...................................................................................................................................... 18
1.4. Content of retry ................................................................................................................................................ 18
2. Error code based troubleshooting ...............................................................................................................20
2.1. “AA” – Back up heater safety error .................................................................................................................. 20
2.2. “AH” – Disinfection operation error .................................................................................................................. 21
2.3. “AJ-03” – Domestic hot water heat duration is too long (warning) .................................................................. 21
2.4. “A1” – Hydro PCB abnormality ........................................................................................................................ 21
2.5. “CJ-02” – User interface room temperature error ............................................................................................ 22
2.6. “C0” – Flow sensor error ................................................................................................................................. 22
2.7. “C4” – Refrigerant liquid thermistor R3T (A1P) abnormality ............................................................................ 22
2.8. “EC” – Domestic hot water temperature error ................................................................................................. 22
2.9. “E1” – Refrigerant/brine PCB abnormality ....................................................................................................... 23
2.10. “E3” – High pressure abnormality .................................................................................................................. 23
2.11. “E5” – Compressor motor lock ...................................................................................................................... 23
2.12. “E7” – Brine flow error ................................................................................................................................... 24
2.13. “E9” – Expansion valve abnormality .............................................................................................................. 25
2.14. “F3” – Discharge pipe temperature control .................................................................................................... 25
2.15. “HC” – Domestic hot water temperature error ............................................................................................... 26
2.16. “H0-01” – Brine flow switch error ................................................................................................................... 26
2.17. “H1” – Optional temperature sensor error (indoor ambient) .......................................................................... 26
2.18. “H3” – High pressure switch system abnormality .......................................................................................... 26
2.19. “H9” – Outdoor air thermistor (R1T) abnormality ........................................................................................... 27
2.20. “J1” – High pressure sensor abnormality ...................................................................................................... 27
2.21. “J3” – Discharge thermistor abnormality ....................................................................................................... 27
2.22. “J5” – Suction thermistor (R3T) abnormality ................................................................................................. 27
2.23. “J6” – Heat exchanger refrigerant inlet thermistor (R4T) abnormality ........................................................... 28
2.24. “J7” – Brine inlet thermistor (R5T) abnormality ............................................................................................. 28
2.25. “J8” – Brine outlet thermistor (R6T) abnormality ........................................................................................... 28

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2.26. “LC” – Transmission system abnormality ...................................................................................................... 28
2.27. “LH” – Converter attention ............................................................................................................................. 29
2.28. “L1” – Refrigerant/brine PCB abnormality ..................................................................................................... 29
2.29. “L4” – Radiation fin temperature abnormality ................................................................................................ 29
2.30. “L5” – Output overcurrent detection .............................................................................................................. 30
2.31. “L8” – Electronic thermal overload ................................................................................................................ 30
2.32. “L9” – Stall prevention (time lag) ................................................................................................................... 30
2.33. “P1” – Open phase or power supply voltage imbalance ............................................................................... 31
2.34. “P4” – Inverter radiation fin thermistor (R10T) error ...................................................................................... 31
2.35. “PJ” – Defective capacity setting ................................................................................................................... 31
2.36. “UA” – PCB combination error ...................................................................................................................... 31
2.37. “U0” – Refrigerant shortage .......................................................................................................................... 32
2.38. “U1” – Reverse phase or open phase ........................................................................................................... 32
2.39. “U2” – Power supply voltage abnormality ..................................................................................................... 33
2.40. “U3-00” – Abnormal stop of underfloor heating dry-out scheduled operation ............................................... 33
2.41. “U4” – Defective indoor-outdoor transmission ............................................................................................... 33
2.42. “U5-00” – Transmission error between user interface and hydro PCB ......................................................... 34
2.43. “7H-01” – Water flow abnormality ................................................................................................................. 34
2.44. “7H-04” – Water flow abnormality during DHW operation ............................................................................. 35
2.45. “7H-06” – Water flow abnormality during pace heating operation ................................................................. 35
2.46. “8F” – Backup heater outlet water temperature error during domestic hot water operation .......................... 36
2.47. “8H” – Backup heater outlet water temperature error ................................................................................... 36
2.48. “80” – R4T entering water thermistor abnormality ......................................................................................... 36
2.49. “81” – Leaving water thermistor R1T abnormality ......................................................................................... 36
3. Symptom based troubleshooting ............................................................................................................... 37
3.1. Capacity shortage - General ........................................................................................................................... 37
3.2. Capacity shortage - Space heating ................................................................................................................. 40
3.3. Capacity shortage - Domestic hot water operation ......................................................................................... 41
3.4. The system does not start/operate .................................................................................................................. 42
3.5. Inaccurate temperature control (for both domestic hot water and space heating operation) .......................... 44
3.6. Water leakage or water release via the water pressure relieve valve ............................................................. 45
3.7. Brine leakage .................................................................................................................................................. 46
3.8. Power consumption too high ........................................................................................................................... 46
3.9. Increased sound level - brine pump ................................................................................................................ 47
3.10. Increased sound level - water pump ............................................................................................................. 48
3.11. Increased sound level - compressor ............................................................................................................. 48
3.12. Tapping water related ................................................................................................................................... 49
3.12.1. High water pressure at tapping point ........................................................................................................ 49
3.12.2. Tapping water has white colour ................................................................................................................49
3.12.3. Bad odour from tapping water ...................................................................................................................49
3.13. Compressor related ....................................................................................................................................... 50
3.13.1. Compressor does not start ........................................................................................................................50
3.13.2. Compressor does not increase frequency ................................................................................................50
3.14. Pump related ................................................................................................................................................. 52
3.14.1. Brine pump behavior ................................................................................................................................. 52
3.14.2. Water pump behavior ................................................................................................................................52
3.15. User interface (no or strange display) ........................................................................................................... 53
4. Component checklist .................................................................................................................................. 54
4.1. Required tools for component check ............................................................................................................... 54
4.2. Backup heater E1H, E2H ................................................................................................................................ 54
4.3. Thermistors R1T, R2T, R3T, R4T, R5T, R6T, R10T ....................................................................................... 58
4.4. Safety valve SV1, SV2 (pressure relief valve) ................................................................................................ 61
4.5. Expansion vessel EXP1, EXP2 ....................................................................................................................... 62
4.6. Brine flow switch S1L ...................................................................................................................................... 63
4.7. Brine pump M3P ............................................................................................................................................. 64
4.8. Water pump M1P ............................................................................................................................................ 66
4.9. Plate type heat exchanger PHE1, PHE2 ......................................................................................................... 67

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4.10. Compressor M1C .......................................................................................................................................... 69
4.11. High pressure sensor B1PH .......................................................................................................................... 70
4.12. High pressure switch S1PH ........................................................................................................................... 71
4.13. Electronic expansion valve K1E .................................................................................................................... 72
4.14. Thermal protector backup heater Q1L .......................................................................................................... 73
4.15. Inverter PCB A10P ........................................................................................................................................ 75
4.16. Water flow sensor B1L .................................................................................................................................. 77
4.17. 3-way valve M3S ........................................................................................................................................... 79
Part 3. Repair ............................................................................................................................83
1. General Repair procedures .........................................................................................................................83
1.1. Refrigerant handling procedures ..................................................................................................................... 83
1.2. Pipe work procedures ...................................................................................................................................... 83
1.3. Products .......................................................................................................................................................... 84
1.3.1. Required products when servicing the Daikin Altherma GSHP .................................................................. 84
1.4. Tools ................................................................................................................................................................ 84
1.4.1. Required special tooling when servicing the Daikin Altherma GSHP ......................................................... 84
2. Unit specific repair procedures ...................................................................................................................85
2.1. Unit specific refrigerant, brine and water procedures ...................................................................................... 85
2.1.1. Removing the front panel ............................................................................................................................ 85
2.1.2. Refrigerant Handling ................................................................................................................................... 86
2.1.3. Draining the brine circuit ............................................................................................................................. 86
2.1.4. Air purge of the brine circuit ........................................................................................................................ 87
2.1.5. Draining the water circuit ............................................................................................................................ 87
2.1.6. Air purge of the space heating circuit .......................................................................................................... 88
2.1.7. Draining the domestic hot water tank .......................................................................................................... 88
2.1.8. Removing the top panel .............................................................................................................................. 88
2.1.9. Removing the switch box cover .................................................................................................................. 89
2.1.10. Opening the sound insulation of the heat pump module (front side only) .................................................89
2.1.11. Unlocking the pivoting power input section ............................................................................................... 90
2.2. Parts replacement procedures ........................................................................................................................ 92
2.2.1. Removing the lower rear panel ................................................................................................................... 92
2.2.2. Replacing a PCB in the switch box ............................................................................................................. 93
2.2.3. Cleaning the brine filter ............................................................................................................................... 98
2.2.4. Cleaning the water filter ............................................................................................................................ 100
2.2.5. Replacing the brine flow switch ................................................................................................................. 102
2.2.6. Replacing the water flow sensor ............................................................................................................... 104
2.2.7. Replacing the brine pump ......................................................................................................................... 105
2.2.8. Replacing the backup heater .................................................................................................................... 106
2.2.9. Replacing the thermal protector backup heater ........................................................................................ 109
2.2.10. Replacing the water pressure relief valve ............................................................................................... 110
2.2.11. Replacing the brine pressure relief valve ................................................................................................ 113
2.2.12. Replacing the water pump ...................................................................................................................... 115
2.2.13. Replacing the compressor ...................................................................................................................... 119
2.2.14. Replacing the water expansion vessel .................................................................................................... 123
2.2.15. Replacing the brine expansion vessel .................................................................................................... 124
2.2.16. Replacing the 3-way valve motor ............................................................................................................ 125
2.2.17. Replacing the 3-way valve body ............................................................................................................. 128
2.2.18. Replacing the water manometer ............................................................................................................. 129
2.2.19. Replacing the brine manometer .............................................................................................................. 131
2.2.20. Replacing the electronic expansion valve K1E body .............................................................................. 133
2.2.21. Replacing the electronic expansion valve K1E electromagnet ............................................................... 135
2.2.22. Replacing the refrigerant high pressure sensor ...................................................................................... 137
2.2.23. Replacing the refrigerant high pressure switch ....................................................................................... 140
2.2.24. Replacing a thermistor (except R10T) .................................................................................................... 143
2.2.25. Replacing temperature sensor R10T ...................................................................................................... 145

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Part 4. Main
tenance ....................................................................................................................................149
1. Yearly maintenance intervals and procedures ......................................................................................... 149
2. Maintenance procedures ......................................................................................................................... 149
2.1. Checking fluid pressure of Space Heating and brine circuit .......................................................................... 149
2.2. Checking for brine leakage ........................................................................................................................... 150
2.3. Checking the pressure relief valve hose ....................................................................................................... 150
2.4. Checking the pressure relief valves of Space Heating and brine circuit ....................................................... 150
2.5. Checking the relief valve of the Domestic Hot Water tank - field supply ....................................................... 151
2.6. Checking the filters of Space Heating and brine circuit ................................................................................. 151
2.7. Draining the Domestic Hot Water tank .......................................................................................................... 152
2.8. Anode ............................................................................................................................................................ 152
2.9. Descaling and chemical disinfection ............................................................................................................. 152
2.10. Checking the Switch box ............................................................................................................................. 152
Part 5. Appendix .....................................................................................................................153
1. Field settings ............................................................................................................................................ 153
1.1. Field settingstable 1 (Software version before 1/04/2015) ............................................................................ 154
1.2. Field settingstable 2 (Software version after 1/04/2015; User interface [6.8.2] ID 4302/4562) ..................... 157
2. Wiring diagrams ....................................................................................................................................... 160
3. Piping diagram ......................................................................................................................................... 164
4. Piping overview ........................................................................................................................................ 165
5. Thermistors .............................................................................................................................................. 166

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List of figures
Required tools for component check .........................................................................................................................54
Required products .....................................................................................................................................................84
Required tools ...........................................................................................................................................................84
Removing the front panel ..........................................................................................................................................85
Refrigerant service ports ...........................................................................................................................................86
Draining the brine circuit ...........................................................................................................................................87
Draining the water circuit ...........................................................................................................................................88
Removing the top panel ............................................................................................................................................88
Removing the switch box cover ................................................................................................................................89
Opening the sound insulation of the heat pump module ...........................................................................................90
Unlocking the pivoting power input section ...............................................................................................................91
Removing the lower rear panel .................................................................................................................................93
Replacing the A1P PCB ............................................................................................................................................94
Replacing the A4P PCB ............................................................................................................................................95
Replacing the A8P PCB ............................................................................................................................................96
Replacing the A9P PCB ............................................................................................................................................97
Replacing the A10P PCB ..........................................................................................................................................98
Cleaning the brine filter .............................................................................................................................................99
Brine filter installation ..............................................................................................................................................100
Cleaning the water filter ..........................................................................................................................................101
Water filter installation .............................................................................................................................................101
Replacing the brine flow switch ...............................................................................................................................103
Replacing the water flow sensor .............................................................................................................................104
Replacing the brine pump .......................................................................................................................................106
Replacing the backup heater - 1 .............................................................................................................................107
Replacing the backup heater - 2 .............................................................................................................................108
Replacing the thermal protector backup heater ......................................................................................................109
Replacing the water pressure relief valve - 1 ..........................................................................................................111
Replacing the water pressure relief valve - 2 ..........................................................................................................112
Replacing the water pressure relief valve - 3 ..........................................................................................................112
Replacing the brine pressure relief valve - 1 ...........................................................................................................114
Replacing the brine pressure relief valve - 1 ...........................................................................................................115
Replacing the water pump - 1 .................................................................................................................................116
Replacing the water pump - 2 .................................................................................................................................117
Replacing the water pump - 3 .................................................................................................................................118
Replacing the water pump - 4 .................................................................................................................................119
Water pump wire strain relief ..................................................................................................................................119
Replacing the compressor - 1 .................................................................................................................................120
Replacing the compressor - 2 .................................................................................................................................121
Replacing the compressor - 3 .................................................................................................................................121
Replacing the compressor - 4 .................................................................................................................................122
Replacing the water expansion vessel ....................................................................................................................123
Replacing the brine expansion vessel .....................................................................................................................124
Replacing the 3-way valve motor - 1 .......................................................................................................................126
Replacing the 3-way valve motor - 2 .......................................................................................................................126
Replacing the 3-way valve motor - 3 .......................................................................................................................127
Replacing the 3-way valve motor - 3 .......................................................................................................................127
Replacing the 3-way valve motor - 4 .......................................................................................................................128
Replacing the 3-way valve body .............................................................................................................................129
Replacing the water manometer - 1 ........................................................................................................................130
Replacing the water manometer - 2 ........................................................................................................................131
Replacing the brine manometer ..............................................................................................................................132
Replacing the electronic expansion valve K1E body - 1 .........................................................................................134
Replacing the electronic expansion valve K1E body - 2 .........................................................................................135
Replacing the electronic expansion valve K1E electromagnet ...............................................................................136
Replacing the electronic expansion valve K1E electromagnet ...............................................................................137
Replacing the refrigerant high pressure sensor - 1 .................................................................................................138
Replacing the refrigerant high pressure sensor - 2 .................................................................................................139
Replacing the refrigerant high pressure sensor - 3 .................................................................................................139

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Replacing the refrigerant high pressure sensor - 3 ................................................................................................ 140
Replacing the refrigerant high pressure switch - 1 ................................................................................................. 141
Replacing the refrigerant high pressure switch - 2 ................................................................................................. 141
Replacing the refrigerant high pressure switch - 3 ................................................................................................. 142
Replacing the refrigerant high pressure sensor - 3 ................................................................................................ 142
Thermistor location ................................................................................................................................................. 143
Replacing a temperature sensor - 1 ....................................................................................................................... 144
Replacing a temperature sensor - 2 ....................................................................................................................... 145
Replacing temperature sensor R10T ..................................................................................................................... 146
Replacing temperature sensor R10T ..................................................................................................................... 147
Field settings table 1-1 ........................................................................................................................................... 154
Field settings table 1-2 ........................................................................................................................................... 155
Field settings table 1-3 ........................................................................................................................................... 156
Field settings table 2-1 ........................................................................................................................................... 157
Field settings table 2-2 ........................................................................................................................................... 158
Field settings table 2-3 ........................................................................................................................................... 159
Wiring diagram 1 (switchbox layout) ...................................................................................................................... 160
Wiring diagram 2 (PCB A1P / A2P / A4P / A8P) .................................................................................................... 161
Wiring diagram 3 (PCB A1P) ................................................................................................................................. 162
Wiring diagram 4 (PCB A9P / A10P) ...................................................................................................................... 163
Piping diagram ....................................................................................................................................................... 164
Piping overview ...................................................................................................................................................... 165
Thermistors ............................................................................................................................................................ 166

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Part 1. Introduction
1. Version log
Version history.
2. Safety precautions
The precautions described in this document cover very important topics, follow them carefully.
All activities described in the service manual must be performed by an authorized person.
If you are not sure how to install, operate or service the unit, contact your dealer.
In accordance with the applicable legislation, it might be necessary to provide a logbook with the product containing at least:
information on maintenance, repair work, results of tests, stand-by periods, …
Also, at least, following information must be provided at an accessible place at the product:
• Instructions for shutting down the system in case of an emergency
• Name and address of fire department, police and hospital
• Name, address and day and night telephone numbers for obtaining service
In Europe, EN378 provides the necessary guidance for this logbook.
2.1. Meaning of symbols
Version code Description Date
Draft 0.1 Preliminary release 20/12/2013
Version 2.0 Addition of hyperlinks from troubleshooting tables towards check and replacement pro-
cedures
13/01/2014
Version 2.0 Update error codes
Update field settings table
13/05/2015
WARNING
Indicates a situation that could result in death or serious injury.
WARNING: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
WARNING: RISK OF BURNING
Indicates a situation that could result in burning because of extreme hot or cold temperatures.
WARNING: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
WARNING: RISK OF POISONING
Indicates a situation that could result in poisoning.

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2.2. Warnings
CAUTION
Indicates a situation that could result in equipment or property damage.
INFORMATION
Indicates useful tips or additional information.
WARNING
Improper installation or attachment of equipment or accessories could result in electric shock, short-circuit, leaks, fire
or other damage to the equipment. Only use accessories, optional equipment and spare parts made or approved by
Daikin.
WARNING
Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions
described in the Daikin documentation).
WARNING
Make sure the work site environment is clean and safe to work in. Beware of spilled fluids, like water, oil or other sub-
stances. Protect bystanders from injury and property from possible damage cause by service works.
WARNING
Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or
servicing the system.
WARNING
Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible
risk: suffocation.
WARNING
Do NOT touch the air inlet or aluminium fins of the unit.
WARNING
• Do NOT place any objects or equipment on top of the unit.
• Do NOT sit, climb or stand on the unit.
WARNING
During tests, NEVER pressurize the product with a pressure higher than the maximum allowable pressure (as indi-
cated on the nameplate of the unit).
WARNING
• Never mix different refrigerants or allow air to enter the refrigerant system.
• Never charge recovered refrigerant from another unit. Use recovered refrigerant only on the same unit where it was
recovered from, or have it recycled at a certified facility.
WARNING: RISK OF BURNING
• Do NOT touch the refrigerant piping, water piping or internal parts during and immediately after operation. It could
be too hot or too cold. Give it time to return to normal temperature. If you must touch it, wear protective gloves.
• Do NOT touch any accidental leaking refrigerant.