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PROBLEM
Heat pump not running
No sufficient heating
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
000 Standby mode
001 Running mode
002 Air ambient
temp. sensor error
003 High pressure
protection
004 Low pressure
protection
005 Water flow
protection
006 Stop running in
limited air temp.
(8°C)
CAUSE
1. No electricity
2. Heat pump not turned on
3. Water pump not running
4. Wrong temperature setting
5. Bypass wrongly adjusted
6. No gass pressure
7. Time delayed operation
8. Air temperature below 10°C
1. Obstacles blocking air flow
2. Ice on the evaporator
3. Bypass wrongly adjusted
4. To much water flow
LED 1
LED 2
LED 3
⚫
⚫
⚫
⚫
⚫
☆
⚫
⚫
☆
⚫
⚫
☆
⚫
⚫
☆
⚫
⚫
☆
⚫
⚫
☆
SOLUTION
1. Switch on the electrical power
2. Switch on the heat pump
3. Switch on the water pump
4. Adjust the temperature setting
5. Adjust bypass as shown in manual
6. Call a qualified technician
7. Wait 3 min for heat pump to start
8. Wait until temperature has risen
1. Increase access of fresh air
2. Turn heat pump off (air too cold)
3. Re-adjust the bypass
4. Adjust the bypass
LED 4
TROUBLE SHOOTING
☆
Standard mode
⚫
Standard mode
⚫
Check the cable connection of the ambient temp. sensor
/ replace the sensor
⚫
Refrigerant system pressure is high, check pressure
gauge, increase the water volume
☆
Refrigerant system pressure is low, check pressure
gauge, refeed refrigerant
☆
Check if the water inlet/outlet connection is correct of not,
increase the water volume
☆
Air temp. is lower than 8°C, stop the heat pump until
temp. over 8°C
18
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