Immergas Magis M 4 EH3 Use And Installation page 114

Supervision
Error Code
System Error Code
EC 13
Ed 14
EE 15
EP 19
P0 20
P1 21
114
Operation anomaly
or protection
Error of low temperature sensor (Tbt2) of
the thermostat manifold.
Error of inlet water temperature sensor
(Tw_in) of plate heat exchanger.
EEPROM fault of the main control board
of hydraulic module.
Leakage fault on tank booster heater
(TBH).
Low pressure protection switch.
High pressure protection switch.
Cause of fault and corrective action
1. Check the sensor resistance.
2. The connector of sensor Tbt2 is loose. Reconnect it.
3. The connector of sensor Tbt2 is wet or there is water inside.
Remove the water, dry the connector. Add waterproof adhesive.
4. Fault of sensor Tbt2, replace it with a new sensor.
1. Check the sensor resistance.
2. The connector of sensor Tw_in is loose. Reconnect it.
3. The connector of sensor Tw_in is wet or there is water inside.
Remove the water, dry the connector. Add waterproof adhesive.
4. Fault of sensor Tw_in, replace it with a new sensor.
1. The EEprom parameter is in error, rewrite the EEprom data.
2. The EEprom component is damaged, replace the EEprom
component.
3. The main control board of the hydraulic module is damaged,
replace it with a new PCB.
Check device connected to the TBH outputs.
1. The system is without refrigerant volume. Charge the
refrigerant at the right volume.
2. In heating mode or in DHW mode, the external heat exchanger
is dirty or something is blocked on the surface. Clean the external
heat exchanger or remove the obstruction.
3. The water flow is too low in cooling mode. Increase the water
flow.
4. The electric expansion valve is blocked or the winding
connector is loose. Touch the body of the valve and connect/
disconnect the connector several times to make sure that the
valve works properly.
Heating mode, DHW mode:
1. The water flow is low; the temperature of the water is high, if
there is air in the water system. Release the air.
2. The water pressure is lower than 0.1 MPa, load the water to leave
the pressure in the range 0.15-0.2 MPa.
3. Refrigerant volume overload. Recharge the refrigerant at the
right volume.
4. The electric expansion valve is blocked or the winding
connector is loose. Touch the body of the valve and connect/
disconnect the connector several times to make sure that the
valve works properly. Also install the winding in the right
position. DHW mode: The storage tank coil is small.
Cooling mode:
1. The protection of the heat exchanger has not been removed.
Remove the protection.
2. The heat exchanger is dirty or something is blocked on the
surface. Clean the heat exchanger or remove the obstruction.