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Below are some common fault codes for Mitsubishi Ecodan and Daikin Altherma air to water heat pumps. If you need help interpreting the error code or fixing.

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Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Printed circuit board defect E Indoor unit HT: The heated water is stored in the domestic hot water tank at a higher temperature so it can fulfil the domestic hot water requirements throughout the day.

NO Compressor inspection The compressor’s coil is disconnected.

Check the surrounding area and altberma on again. Higher voltage than actual is displayed when the inverter output voltage is checked by tester. E S1PH High pressure switch In order to prevent the increase of high pressure when a malfunction occurs, this switch is activated at high pressure of 3. Push the w button for 5 seconds.

System impedance Specifications 7 Specifications 1. This function can only be activated by the shower button. Therefore, gauge manifolds and charge hoses that are used with a previous refrigerant R,RC can not be used for products that use new refrigerants. I am quite certain I’ll learn plenty of new stuff right here!


Malfunction Decision Conditions When normal transmission is not conducted for certain duration. Code defaut eclimatisations pac daikin.

NO Replace the control PC board. This symbol indicates an action that must be taken, or an instruction. Really the blogging is spreading its wings rapidly.

NO Replace the moving part of the electronic expansion valve. Before recharging, make sure to execute vacuum drying of the internal piping of the unit as well.

Automatic maxium domestic hot water ddaikin temperature: Check if the cooling fans at the rear of the switch box are working properly. After the vacuum drying is finished, open valve A 5 and charge the additional refrigerant in its liquid state through the service port on the liquid stop valve taking into account following instructions: Shower icon should be led. Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.

Malfunction code Detail description on next page.


Daikin Altherma HT Service manual |

Check if the 3-way valve is connected correctly to X2M. Charge the liquid refrigerant with the cylinder in up-side-down position. Replace indoor unit PC board. Evacuate the system from the liquid and gas pipes by using a vacuum pump for more than 2 hours and bring the system to — The prohibited item or action is shown inside or near the symbol.

This can be used as countermeasure for thermistor tolerances or capacity shortage.

Mitsubishi Ecodan & Daikin Altherma Fault Codes / Error Codes

The system is controlled with centralized control. YES Connector of atlherma motor is disconnected. Wiring depending on model 9. After that, properly connect the power supply cable, and then altnerma ON the power supply. In case of benefit kWh rate power supply installations 6: Otherwise, the user interface will return to normal operation.

Troubleshooting Troubleshooting by Remote Control 2. Malfunction Decision Conditions When the liquid thermistor becomes disconnected or shorted while the unit is running.