Idea ISW-10 SF1-DN1, Installation Manual, Page: 61 / 66

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3. The sensor connection
line is open or shorted.
4. The sensor is damaged. 4. Replace the sensor.
F5
Protection for water
flow switch off
1, Insufficient water flow.
2. There is air in the
circulating water inlet pipe.
3.The circulation pump is
damaged.
4. The water flow switch is
damaged. 1. Clean the Y filter and increase
the water flow.
2. Vent the air in the circulating
water inlet pipe.
3. Check the circulation pump and
capacitor and repair it.
4. Replace the water flow switch.
F9
Protection for
anti-freezing switch
off under cooling
mode / /
FA
Insufficient water flow
protection
1.Dirty waterway blocked;
2.Improper installation of
inlet and outlet water
temperature sensor
detection position leads to
inaccurate water
temperature detection
3.Water pump is too small;
1.Cleaning the waterway;
2. Check whether the position of
the water temperature sensor is
correctly installed and reinforced;
3,Change the water pump.
“8888”flash
Communication failur
e between controller
and main board 1. The interface between
the operation panel and
main board is loose.
2. The signal line is open. 1. Check the operation panel and
motherboard.
2.Strengthen the interface.
3. Replace the signal cable.
A4
Discharge temp TD
temp sensor fault
1. The interface between
the sensor and the main
board is loose or detached.
2. The sensor probe comes
off.
3. The sensor connection
line is open or shorted.
4. The sensor is damaged.
1. Check and reinforce the
interface between the sensor and
the main board.
2. Re-fix the sensor probe.
3. Repair the sensor cable.
4. Replace the sensor.
A7
Suction temp Ts
temp sensor fault
1. The interface between
the sensor and the main
board is loose or detached.
2. The sensor probe comes
off.
3. The sensor connection 1. Check and reinforce the
interface between the sensor and
the main board.
2. Re-fix the sensor probe.
3. Repair the sensor cable.
4. Replace the sensor.