DOMINATOR INSTALLATION AND OPERATION INSTRUCTIONS Page 37
No Power To Unit Power not connected Wire unit to line voltage
External circuit breaker open Reset breaker
Relay board fuse (24V) blown Replace fuse
Transformer circuit breaker open Reset breaker
(4 stage)
No Action On Call For Heat Primary limit or other • Check indicator board, reset limit
control/interlock open or control or resolve problem as
applicable
• If not resolved, check wiring and
condition of limit.
Low water cutoff open • Check circulating pump
• Check pump contact in J-box
• Check LWCO wiring and condition
Stage control sensor(s) not wired • Wire sensor(s) to J-box or replace
or are malfunctioning as necessary
• Check error message on control,
refer to control documentation
Stage control malfunction Replace stage control
No Power To Pump Pump contact not wired Wire pump contact to J-box
Stage control malfunctioning Replace stage control
Pump malfunctioning Replace pump
No Power to Power Venter Power venter contact not wired Wire power venter contact to J-box
Power venter not wired to Wire power venter as shown in
external power connection diagram
Relay fault Replace relay
Power venter fault Replace power venter
Power Venter On, Power venter interlock open • Check indicator board for power
No Action From Unit vent indication
• If indication exists, check fl ue or
chimney for blockage
Power venter interlock not wired Wire power venter interlock as
shown in connection diagram
No Power To Blower(s) Blower(s) not plugged in Plug in blower(s)
Relay fault Replace blower relay
Blower(s) malfunctioning Replace blower(s)
Fault in prepurge circuit Replace timer board
Unit Does Not Spark Incorrect spark gap or shorted Adjust ignitor rod or correct short
ignitor lead
Bad ground on fl ame sense Check ground connections,
module adjust as necessary
Low air (blocked fl ue/inlet) • Check indicator board for low air
condition indication
• If condition exists, check inlet, fl ue,
chimney for blockage
• Check combustion air/ventilation
openings in space
• Check inlet air fi lter, clean/replace
as necessary
Trouble-Shooting
PROBLEM POSSIBLE CAUSES CORRECTIVE ACTION
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