39
warmhaus.com
Error
Code
Description of the
Error
Malfunction
Probable Cause
Solution(s)
E 20
CH vertemperature,
Temperature
Central Heating >
TSP 81 value °C
Boiler does not
work, E81 error
code flashing on the
screen
> Lack of water on
the system
> Pump blockage
> Pump failiure
> Pump harness
> Installation
blockage
1-) RESET boiler at first check if problem
removed
2-) Check boiler central heating valves are
open if they are closed open all
3-) Check all radiator valves are open if
they are closed open minimum 3 meters of
radiator must be open
4-) RESET boiler and check if problem
removed
5-) Call for authorised service
E 21
Delta Temperature
Central Heating
flow and Return >
TSP 82 value °C
Boiler does not
work, E21 error code
flashing on the
screen
> Lack of water on
the system
> Pump blockage
> Pump failiure
> Pump harness
> Installation
blockage
1-) RESET boiler at first check if problem
removed
2-) Check boiler central heating valves are
open if they are closed open all
3-) Check all radiator valves are open if
they are closed open minimum 3 meters of
radiator must be open
4-) RESET boiler and check if problem
removed
5-) Call for authorised service
E 28
Maximum allowed
consecutive lock-
out reset reached
Usable RESET
number reached.
Too many
consecutive
lock-out failures
(followed by
reset) due to other
possible causes
1-) Removing power supply reset will be
allowed
2-) Check the root cause of Error code to
solve
3-) If fault still persists call for authorised
service
E 37
Low voltage
anomaly
Boiler does not
work, E37 error
code flashing on the
screen
Low voltage < 165
VAC +/- 5%
on the supply
network during
normal operation
OR < 182 VAC +/-
5% during Au-TO
calibration mode
1-) Call for Electrical supply network
provider
2-) Error will remove if supply voltage >
170 VAC +/- 5%
3-) If this failure is observed during
calibration calibration can not be complete
unless supply voltage > 188 VAC +/- 5%
E 40
Wrong network
frequency
survey
Boiler does not
work, E40 error
code flashing on the
screen
Wrong frequency of
the electric supply
network. Value out
of tolerance, 50 Hz
+/- 5%
1-) Call for Electrical supply network
provider
2-) Error will remove if supply frquency 50
Hz +/- 5%
E 41
Loss of flame more
than 6 successive
times
Boiler does not
work, E41 error
code flashing on the
screen
> Too many
domestic hot water
request in short
period ( 1 min )
> Low gas pressure
1-) Call for authorised service at first
E 42
Buttons anomaly
Boiler does not
work, E42 error
code flashing on the
screen
Wrong parameters
settled on TsP menu
1-) Call For service
