Danfoss DHP-A Service Instructions Manual
Domestic heat pumps
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- Service instructions manual (86 pages) ,
- Installation instructions manual (74 pages) ,
- Installation manual (64 pages)
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Summary of Contents for Danfoss DHP-A
- Page 1 MAKING MODERN LIVING POSSIBLE Service instructions Domestic heat pumps DHP-A DHP-A Opti DHP-C DHP-C Opti DHP-C Opti W/W DHP-H DHP-H Opti DHP-H Opti Pro DHP-L DHP-L Opti DHP-L Opti Pro www.heating.danfoss.com...
- Page 2 Danfoss A/S is not liable or bound by warranty if these instructions are not adhered to during installation or service. The English language is used for the original instructions. Other languages are a translation of the original instructions. (Directive 2006/42/EC)
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Page 3: Table Of Contents
Operational problems ............Danfoss Heating Solutions... -
Page 4: Installing Accessories/Additional Functions
In the event of a surplus of heat the conditions are the opposite: ROOM FACTOR Desired room temperature, °C Actual room temperature, °C Set point for supply line, °C Install the room sensor The room sensor is connected to a safety extra-low voltage. VIGFI102 Danfoss Heating Solutions... -
Page 5: Evu Function
3. Route the tariff control function’s connecting cable through the opening in the top panel forward to the connecting block. 4. Connect the cable as illustrated below. 10 kΩ 5. Install the front cover on the heat pump. Switch on the power supply. Danfoss Heating Solutions VIGFI102... -
Page 6: Level Switch
In certain countries there is a requirement that the heat pump must be equipped with a level switch for the brine system. Always check local rules and regulations before commissioning the heat pump. Safety valve Level switch Floats Connect the flow sensor according to the installation instructions supplied with the accessory. VIGFI102 Danfoss Heating Solutions... -
Page 7: Troubleshooting
On certain models alarms from the brine value instead (applies to the DHP-A models). pump or soft starter can also occur. Compressor stopped. BRINE OUT... -
Page 8: Check Points
Danfoss TUBE R407C, 17,0 kW From fully closed position, screw 5,5 turns out Refrigerant Pressure switch Break pressure R404A (Only applies to the DHP-A models) Low pressure switch 0.08 MPa Operating pressure switch A 2.65 MPa Operating pressure switch B 2.85 MPa... -
Page 9: Operational Problems
7. Incorrect type of anti-freeze, must Check that the correct type of anti-freeze is used. If the incorrect type of anti-freeze is used, be in accordance with instructions. the entire system must be drained and refil- led with a new mixture. Danfoss Heating Solutions VIGFI102... - Page 10 If the evaporator is thought to be blocked frigerant side. check that the unit’s overheating is correct for the by oil for example, try blowing nitrogen specific refrigerant. through it to release the oil. If this does not work, it must be replaced VIGFI102 Danfoss Heating Solutions...
- Page 11 Danfoss Heating Solutions VIGFI102...
- Page 12 If the condenser is thought to be blocked erant side. check that the unit’s overheating is correct for the by oil for example, try blowing nitrogen specific refrigerant. through it to release the oil. If this does not work, it must be replaced VIGFI102 Danfoss Heating Solutions...
- Page 13 Measurement points. ▪ If the read off value does not correspond with the table, only measure the sensor and check the ohm table, see chapter Measurement points. Danfoss Heating Solutions VIGFI102...
- Page 14 The submersible tube can be prised out tric heating element is against the heating protection trips. This normally trips at 95°C. slightly from the coils using a screwdriver coils. or similar. The submersible tube must be vertical. VIGFI102 Danfoss Heating Solutions...
- Page 15 Try cutting the voltage to the heat pump to stop the alarm and then manually run the brine pump. If the alarm recurs, repeat the procedure several times. If this does not help, replace the brine pump. Danfoss Heating Solutions VIGFI102...
- Page 16 If leak tracer is not available, brush soap water on the sus- pected leak and look for bubbles. Also check for oil as this can come out from the refrigerant circuit. VIGFI102 Danfoss Heating Solutions...
- Page 17 As the safety valve does not let any air in, the expansion tank can retract inwards due to the vac- uum created. Danfoss Heating Solutions VIGFI102...
- Page 18 2. Touching pipes – vibrations. Establish which pipe(s) is/are causing the problem. Try to release any tensions that cause the vibrations. 3. Compressor fault. Determine whether the compressor is unusually If the compressor is defective, replace it. loud. VIGFI102 Danfoss Heating Solutions...
- Page 19 ▪ Improve the acoustic environment in the area where the heat pump in loca- ted by installing acoustic panels on the walls and ceiling. ▪ Install a hood on the compressor (most effective for high frequencies). Danfoss Heating Solutions VIGFI102...
- Page 20 (at too low a pres- ratus. pressure, replace it. sure). The replacement pressure switch can be in- Hot water production ends when stalled on the service output (Schrader the operating pressure switch valve). opens. VIGFI102 Danfoss Heating Solutions...
- Page 21 Check what the relevant sensor shows. Is it a plau- If the sensor is defective, replace it. SUPPLY LINE/RETURN LINE. sible/actual value? Measure the resistance of the sensor, check against the ohm table, see chapter Measurement points. Danfoss Heating Solutions VIGFI102...
- Page 22 (the heat emitting sur- closed or partially closed? face increased). ▪ Check if heat production stops because the heating system is under dimensioned? VIGFI102 Danfoss Heating Solutions...
- Page 23 MAX STEP 5 = 15 kW (only DHP-A ) MAX STEP +4 = 12 kW (only DHP-A , can cut MAX STEP +4 = 12 kW (only DHP-A ) in when the compressor is running.)
- Page 24 Take out and clean the jammed insert, or If the insert is not sealed, hot water the valve by pressing the control arm. replace with a new insert. from the water heater will mix with the radiator water. VIGFI102 Danfoss Heating Solutions...
- Page 25 Avoid placing near ex- ternal doors, windows and heat sour- ces. ▪ Install the outdoor sensor according to the instructions and calibrate it, if nec- essary. Danfoss Heating Solutions VIGFI102...
- Page 26 The compressor should then start to produce hot water and 2 minutes later the auxiliary heater starts. The compressor must then stop and the stop temperature be reached with only the auxiliary heater connected. Take no corrective action. VIGFI102 Danfoss Heating Solutions...
- Page 27 Take no corrective action, this is normal. 3. The compressor cannot run due Check the alarm that is indicated in the display. Rectify the problem and rest the alarm. See to an alarm. chapter Alarms. Danfoss Heating Solutions VIGFI102...
- Page 28 Clean the strainer if necessary. system. 2. The compressor cannot run due Check the alarm that is indicated in the display. Rectify the problem and rest the alarm. See to an alarm. the Operational problem – Alarm. VIGFI102 Danfoss Heating Solutions...
- Page 29 (not just warm) even control computer requesting auxili- a distance from the compressor. ary heating. ▪ When the compressor runs with the phases in- correctly sequenced a strange noise may be heard (loud, rattling) when the compressor runs backwards. Danfoss Heating Solutions VIGFI102...
- Page 30 ▪ If hot water consumption increases, a larger proportion of time is used to produce hot wa- ter, which means less time for heat produc- tion. VIGFI102 Danfoss Heating Solutions...
- Page 31 Check the connection against the instructions/ If the auxiliary heater is incorrectly connec- heater. Does not start when the wiring diagram. Test the function in manual mode. ted, reconnect according to the instruc- control computer gives the signal. tions. Danfoss Heating Solutions VIGFI102...
- Page 32 NOTE! A heating cable may have to be installed in the drainpipe. VIGFI102 Danfoss Heating Solutions...
- Page 33 Service instructions Domestic heat pumps Danfoss Heating Solutions VIGFI102...
- Page 34 Service instructions Domestic heat pumps VIGFI102 Danfoss Heating Solutions...
- Page 35 Service instructions Domestic heat pumps Danfoss Heating Solutions VIGFI102...
- Page 36 Internet: www.heating.danfoss.com Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies.