RBI Dominator Series Installation & Operating Instructions Manual page 36

TROUBLE-SHOOTING
PROBLEM
No Power To Unit
No Action On Call For Heat
No Power To Pump
No Power to Power Venter
Power Venter On,
No Action From Unit
No Power To Blower(s)
Unit Does Not Spark
36
Finned copper tube gas boilers & water heaters – Boiler Manual F F Fi d b b il
POSSIBLE CAUSES
Power not connected
External circuit breaker open
Relay board fuse (24V) blown
Transformer circuit breaker open (4 stage)
Primary limit or other control/interlock
open
Low water cutoff open
Stage control sensor(s) not wired or are
malfunctioning
Stage control malfunction
Pump contact not wired
Stage control malfunctioning
Pump malfunctioning
Power venter contact not wired
Power venter not wired to external power
Relay fault
Power venter fault
Power venter interlock open
Power venter interlock not wired
Blower(s) not plugged in
Relay fault
Blower(s) malfunctioning
Fault in prepurge circuit
Incorrect spark gap or shorted ignitor lead
Bad ground on fl ame sense module
Low air (blocked fl ue/inlet) condition
Spark generator fault
& h B il M
CORRECTIVE ACTION
Wire unit to line voltage
Reset breaker
Replace fuse
Reset breaker
• Check indicator board, reset limit or control or
resolve problem as applicable
• If not resolved, check wiring and condition of
limit.
• Check circulating pump
• Check pump contact in J-box
• Check LWCO wiring and condition
• Wire sensor(s) to J-box or replace as necessary
• Check error message on control, refer to
control documentation
Replace stage control
Wire pump contact to J-box
Replace stage control
Replace pump
Wire power venter contact to J-box
Wire power venter as shown in connection
diagram
Replace relay
Replace power venter
• Check indicator board for power vent indication
• If indication exists, check fl ue or chimney for
blockage
Wire power venter interlock as shown in
connection diagram
Plug in blower(s)
Replace blower relay
Replace blower(s)
Replace timer board
Adjust ignitor rod or correct short
Check ground connections, adjust as necessary
• Check indicator board for low air indication
• If condition exists, check inlet, fl ue, chimney for
blockage
• Check combustion air/ventilation opening in
space
• Check inlet air fi lter, clean/replace as necessary
as necessary
• Check spark generator wiring
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