What it means
Daikin's service manual says the code appears if the fan doesn't start 15 to 30 seconds after it is switched on, or if its rotation signal is wrong while it runs, and that it is reset at the controller. Daikin UK also mentions the fan motor drawing too much current.
What to check, in order
- Check nothing is blocking the outdoor unit
Daikin UK's homeowner guide says to keep the front of the outdoor unit clear, not to lean anything against it, and to brush leaves or debris off the back with a soft brush.
- Read the help text
On the controller, open the main menu and choose Malfunctioning to see the code and a short description. The help button gives a longer one. Note the code for your installer.
- Use emergency heating if you need it
Daikin's user reference guide says the backup heater can take over the heating when the heat pump fails. If emergency mode is set to Manual, you confirm this on the Malfunctioning screen. Expect higher electricity bills while it runs.
When to call your installer
If nothing is blocking the fan, call your installer. Daikin's service manual lists a faulty outdoor fan motor or a faulty main PCB as the causes.
A repair visit will usually check the outdoor fan motor, its wiring and anything blocking the blades.
- Note the model and serial number. They're on a label on the rating plate on the outdoor unit, and on the indoor unit or cylinder.
- Write down the exact code, and what the appliance was doing when it appeared.
- Check whether it's still under warranty. If it is, the repair may cost you nothing.
Quick answers
What does the Daikin Altherma E7-00 error code mean?
The fan in the outdoor unit isn't starting or running properly, so the heat pump has stopped. Daikin's service manual says the code appears if the fan doesn't start 15 to 30 seconds after it is switched on, or if its rotation signal is wrong while it runs, and that it is reset at the controller. Daikin UK also mentions the fan motor drawing too much current.
Can I fix Daikin Altherma E7-00 myself?
Tricky (engineer visit likely). Start with: check nothing is blocking the outdoor unit; read the help text; use emergency heating if you need it. If nothing is blocking the fan, call your installer. Daikin's service manual lists a faulty outdoor fan motor or a faulty main PCB as the causes.
Is Daikin Altherma E7-00 worth repairing?
Worth fixing. Daikin's service manual points to the fan motor or the main board, so expect an engineer visit.
Checked against
- Daikin Altherma 3 R W installer reference guide 4P496758-1B (ERGA-D, EHBH/EHBX-D), troubleshooting and error codes, p. 89 (ManualsLib copy)
- Daikin Altherma 3 R ECH2O installer reference guide, error codes overview, p. 275 (ManualsLib copy)
- Daikin service manual ESIE20-06A, Daikin Altherma 3 M (EBLA/EDLA), PDF (copy hosted on the OpenEnergyMonitor forum)
- Daikin UK: Homeowner support
- Daikin UK: Daikin Altherma Low Temperature Split Heat Pump user guide (2015), PDF
- Daikin Altherma low temperature split user reference guide 4P499574-1A (EHVH04/08S23DAV), PDF
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.