Warmhaus EWA 20, Installation Manual

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Error Code Description of the Error Malfunction Probable Cause Solution(s)
E 01 Intervention of exhaust
Thermostat Boiler does not work, E01
error code flashing on the
screen Flue Sensor faulty 1-) Call for authorized service
2-) Check probe resistance if it’s out of tolerance replace NTC
3-) Check cabling and connectors between double NTC and board
4-) Reset & Restart boiler
E 02 Low pressure in the CH
system Boiler does not work, E02
error code flashing on the
screen Water pressure in the
boiler is too low Tsp.
Parameter wrongly
settled" 1-) Fill the boiler to a pressure of 1.0 – 1.5 bar cold
2-) Check the pressure on the LCD and the manual pressure gauge.
3-) If problem persist call for authorized service
4-) Check Tsp. parameter P44 as default value for boiler
5-) Reset & Restart boiler
E 03 High water pressure in the
system Boiler does not work, E03
error code flashing on the
screen High Water pressure in the
boiler higher than > 2,8 bar 1-) Drain the boiler water until 1,0 -1,5 bar cold
2-) Check if the system pressure 1,0 - 1,5 bar from the manometer
located right & bottom of the boiler
3-) If problem persist call authorized service
4-) Check expansion vessel preset charge, should be 0.75 bar.
E 04 DHW sensor faulty Boiler does not work on
DHW mode but still work
on Central heating mode,
E04 error code flashing on
the screen Domestic heating water
temperature sensor faulty 1-) Call for authorized service
2-) Check intermittent contacts or open contacts on harness carefully
3-) Check DHW sensor resistance if it’s out of tolerance replace NTC
4-) Check cabling and connectors between double NTC and board
5-) Reset & Restart boiler
E 05 Central heating FLOW
temperature sensor faulty Boiler does not work, E05
error code flashing on the
screen Central heating FLOW
temperature sensor faulty 1-) Call for authorized service
2-) Check intermittent contacts or open contacts on harness carefully
3-) Check Central heating temperature sensor resistance if it’s out of
tolerance replace NTC
4-) Check cabling and connectors between double NTC and board 5-)
Reset & Restart boiler
E 06 No ignition Boiler does not work, E06
error code flashing on the
screen Gas supply failure 1-) RESET boiler - check if problem resolved
2-) Check if other gas devices if they are working
3-) Check if main gas supply valve is open or not
4-) Check if boiler gas supply valve bellow the boiler is open or not
5-) RESET boiler check if problem resolved
6-) Call for authorized service
7-) Check gas supply pressure must be 17-20 Mbar. Gas pressure must
be in between on this value while boiler on operational.
8-) Check earth connector between PCB and earth connector
9-) Check the flue is correct
10-) Check any problems on the ignition electrode, (like condensation,
rust etc.), and control positioning of the electrode, if electrode
position is wrong calibrate electrode.
11-) Check burner is clean if not clean it with plastic brush
12-) Check for condensation on the cabling AND/OR on board
13-) Check earth connection between board and electrode
14-) Check if electrode ignites directly on burner or not. If there is
current leak replace electrode cable
15-) Check PCB and replace if required
16-) Check gas valve and replace if required
E 07 Safety thermostat
intervention Boiler does not work
E07 error code flashing on
the screen Lack of water on the
system
Pump blockage
Pump failure
Pump harness
Installation blockage 1-) RESET boiler first to check if problem is resolved
2-) Check boiler central heating valves are open if they are closed
open all of the valves
3-) Check all radiator valves are open if they are closed open the
valves—a minimum 3 meters ?? of radiator must be open
4-) RESET boiler and check if problem resolved
5-) Call for authorized service
6-) Check Pump operation and if the pump circulation through the
heat exchanger is sufficient
7-) Check intermittent contacts on harness carefully. Check the pump
and PWM cable, pump main supply connector, pump main connector,
measure voltage from connectors
8-) Check if there is air in the heat exchanger or system, remove air if
any by activating the Deareation mode
9-) Check heat exchanger water path
10-) Reset & restart boiler
4. FAULT FINDING & SOLUTIONS

INFORMATION