Dunkirk Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler - Manual (Page 48)

48
Screen Display Explanation
Go to Page For
Troubleshooting
Control has blocking error for more than 20
hours in a row.
Go to Page 50
Three unsuccessful ignition attempts in a row Go to Page 51
Open gas valve power circuit. May involve
high temperature switch, gas valve, or gas
valve relay in control module.
Go to Page 50
Safety Circuit is open. Go to Page 52
Blower speed does not reach speed calculated
by Control Module.
Go to Page 53
Control Module internal error.
Replace Control
Module
High Temperature opens during normal
operation.
Go to Page 54
Control Module detects flame after gas valve
is closed more than 10 seconds.
Replace Gas Valve
Flame is detected before gas valve opens. Replace Gas Valve
Control module internal error.
Replace Control
Module
Lost flame signal 3 times during one heat call. Go to Page 55
Control Module internal error.
Replace Control
Module
Control Module internal error.
Replace Control
Module
External voltage supplied to DHW T-T or CH
T-T terminals. Eliminate voltage using dry
contact relay.
-
Flame detected when gas valve is closed. Go to Page 55
B l o c k i n g E r r o r
R E F L O t o o L O
13 - TROUBLE SHOOTING