Itho Daalderop fault code P01
Fault code P01 on an Itho Daalderop heat pump (including HP-S) means: Evacuation was not carried out correctly during installation and air has entered the refrigerant system. Reset the appliance once. If the code comes back, a part is usually faulty. You can check the water pressure and settings yourself; leave work on gas-carrying parts to a certified gas engineer.
After a safety alert (gas, flue gas, combustion), reset no more than once and call in a certified gas engineer. If you smell gas, call your national gas emergency number or 112 immediately.
Cause
Fault code P01 on an Itho Daalderop heat pump indicates: Evacuation was not carried out correctly during installation and air has entered the refrigerant system.
Applies to
Itho Daalderop HP-S, HP-S 130 lucht/water heat pump, indoor unit, HP-S 130 lucht/water heat pump, outdoor unit, HP-S 55 lucht/water heat pump, indoor unit, HP-S 55 lucht/water heat pump, outdoor unit, HP-S 95 lucht/water heat pump, indoor unit, HP-S 95 lucht/water heat pump, outdoor unit.
Fault code P01 on other Itho Daalderop series
The same code does not mean the same thing on every series. Check the rating plate to see which series you have:
- P01 on HP-S, HP-S 130 lucht/water heat pump, indoor unit, HP-S 130 lucht/water heat pump, outdoor unit, HP-S 55 lucht/water heat pump, indoor unit, HP-S 55 lucht/water heat pump, outdoor unit, HP-S 95 lucht/water heat pump, indoor unit: There is too much refrigerant in the system.
- P01 on HP-S, HP-S 130 lucht/water heat pump, indoor unit, HP-S 130 lucht/water heat pump, outdoor unit, HP-S 55 lucht/water heat pump, indoor unit, HP-S 55 lucht/water heat pump, outdoor unit, HP-S 95 lucht/water heat pump, indoor unit: The air flow through the outdoor unit is insufficient.
- P01 on HP-S, HP-S 130 lucht/water heat pump, indoor unit, HP-S 130 lucht/water heat pump, outdoor unit, HP-S 55 lucht/water heat pump, indoor unit, HP-S 55 lucht/water heat pump, outdoor unit, HP-S 95 lucht/water heat pump, indoor unit: The input current is too high or too low, or the system is overloaded.
Matching parts
Itho Daalderop parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
- Itho Daalderop temperature sensor HP-S for e.g. HP-S 55 outdoor unit 05-00415 € 13.07
- Itho Daalderop room temperature sensor HP-S 05-00417 € 13.73
- Itho Daalderop thermostat with manual reset 05-00412 € 16.34
Fix it yourself or call an engineer?
Always consult the manual for your appliance and work safely. If in doubt or if the fault comes back, call in a qualified professional. A question about a part? Write to us at info@instalpunt.nl.
Frequently asked questions
What does Itho Daalderop heat pump fault code P01 mean?
Evacuation was not carried out correctly during installation and air has entered the refrigerant system.
How do I fix fault code P01 on an Itho Daalderop heat pump?
First check the cause described above. Then restart the appliance using the reset button. If the message comes back, a part usually needs replacing or the fault needs to be repaired by a qualified professional.
Which parts do I need for Itho Daalderop fault code P01?
That depends on the exact cause. In the Itho Daalderop parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code P01 myself?
You can reset the appliance and check things like the water pressure or settings yourself. Work on gas-carrying parts must be left to a certified gas engineer.
All Itho Daalderop heat pump faults and codes at a glance →