Dunkirk DKVLT-050 Installation, Operation & Maintenance Manual page 49

Screen Display
B l o c k i n g E r r o r
E 39
F l u e G a s E r r o r
13 - TROUBLE SHOOTING
Low water cutoff sees no water.
Flue temperature sensor sees temperature
higher than 200°F.
3
Return water temperature sensor sees
temperature higher than 200°F.
Control board internal error. Power down then
power up boiler. If error repeatedly occurs
replace control module.
Boiler is powered by three wires, hot, neutral
and ground. E44 displays when neutral wire is
not neutral.
Control board sees power supply frequency not
in range of 59 to 61 Hz.
Boiler power supply ground wire is not
grounded.
Control board internal error. Power down then
power up boiler. If error repeatedly occurs
replace control module.
Supply temperature sensor is open. No
continuity.
Return water temperature sensor is open. No
continuity.
Flue temperature sensor is open. No
continuity.
Supply water temperature sensor is shorted.
'0' Ohm
Return water temperature sensor is shorted.
'0' Ohm
Flue temperature sensor is shorted. '0' Ohm
Reset button was pressed too many times.
Fault detected in blower motor system.
Explanation
49
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Troubleshooting
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Replace Control
Module
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Replace Control
Module
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Error Clears in 1-2
minutes
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