Warmco HR10, Instruction Manual, Page: 20 / 28

Instructions condensing Air heaters type HR version HR-GB-4001-a
Page
2 Then check the CO
2
in Low fire. (mode 2) The CO
2
in low fire is lower than the high fire
CO
2
.
Decrease the CO
2
turn the Offset adjuster to the left.
Increase the CO
2
turn the Offset adjuster to the right
After adjusting the CO
2
in Low fire, return to high fire, and Readjust the CO
2
with the Ratio
adjuster.
Then return to Low fire again and eventually readjust the CO
2
with the Offset adjuster.
Repeat these steps until both values are OK.
Never forget to check the CO (carbon monoxide ) production of the heater!!! Too much CO
means mostly that the mixture is too rich. CO value should always be below 100 ppm.
8 Problem solving
8.1 General
When it turns out that the problem is not caused by the external circumstances (i.e. no electric
supply power or no gas), please take the following instructions into account. Please remember
the built in waiting times of the heater (do not react too soon!) and the signals of the LEDs and
the code on the display on the electronic circuit board.
Volatile lock out
Can only be reset by hand
Display Explanation Cause
L-0 Internal
error Internal error 13
L-1 Ignition
error After ignition only 5 seconds flame 1
No flame 2
L-2
L-3 Internal
error Internal error 13
L-4 E- error longer than 24hr 12
L-5
Burner fan Burner fan does not work. 6
L-6
L-7 Burner fan Burner fan rotates at the wrong speed. 7
L- 8, 9,
10, 11,
12 Internal
error Internal error 13
L-13 Pressure
switch Pressure switch is closed in stand by 14
L-14 Pressure
switch Pressure switch does not close at pre-purge 11
L-15 Overheat Sensor heat exchanger is overheated 3
L-16 Flue temp. Flue sensor is overheated 3
L-17, 18,
19 Internal
error Internal error 13
L-20 Flame error Flame detected after closing gas valve 15
L-21 Flame error Flame detected before opening gas valve 16
L-20 Flame error Flame failure during burning detected 5
L-25 Sensor
error Sensor heat exchanger fault 4
L-26 Sensor
error Flue sensor fault 4
L-27, 28,
29, 30,
31 Internal
error Internal error 13
L-32 Sensor Sensor heat exchanger fault 4