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PROBLEM
CAUSE
SOLUTION
Heat pump not running
1. No electricity
1. Switch on the electrical power
2. Heat pump not turned on
2. Switch on the heat pump
3. Water pump not running
3. Switch on the water pump
4. Wrong temperature setting
4. Adjust the temperature setting
5. Bypass wrongly adjusted
5. Adjust bypass as shown in manual
6. No gass pressure
6. Call a qualified technician
7. Time delayed operation
7. Wait 3 min for heat pump to start
8. Air temperature below 10°C
8. Wait until temperature has risen
No sufficient heating
1. Obstacles blocking air flow
1. Increase access of fresh air
2. Ice on the evaporator
2. Turn heat pump off (air too cold)
3. Bypass wrongly adjusted
3. Re-adjust the bypass
4. To much water flow
4. Adjust the bypass
5.3 Microcontroller
The ECO+ heat pumps are equipped with a microcontroller on which it is possible to read error codes.
These error codes are formulated by LED lights on the circuit board. To access the circuit board, remove
the 4 screws of the service cover (with “ECO+” on it). At the top of heat pump you will find the PCB
containing the LED lights.
Compare which LEDs are lit to the following error code table
ERROR CODE
LED 1
LED 2
LED 3
LED 4
TROUBLE SHOOTING
000 Standby mode
Standard mode
001 Running mode
Standard mode
002 Air ambient
temp. sensor error
Check the cable connection of the ambient temp. sensor
/ replace the sensor
003 High pressure
protection
Refrigerant system pressure is high, check pressure
gauge, increase the water volume
004 Low pressure
protection
Refrigerant system pressure is low, check pressure
gauge, refeed refrigerant
005 Water flow
protection
Check if the water inlet/outlet connection is correct of not,
increase the water volume
006 Stop running in
limited air temp.
(8°C)
Air temp. is lower than 8°C, stop the heat pump until
temp. over 8°C
14


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