Troubleshooting - UTICA BOILERS UB90 125 Installation Manual And Operating Instructions

The indicator lights track the operating sequence. If the system locks out, the lights indicate the point in
the sequence of operation were lockout occurs. If this table does not readily provide the reason for boiler
malfunction or non-operation, refer to the following pages for more detailed troubleshooting procedures.
LIGHT STATUS
On
POWER Off
Blinking
On
Off
PURGE
Blinking
On
IGNITER
Off
On
Off
VALVE
Blinking
On Bright
FLAME On Dim
Off
ELECTRICAL SHOCK HAZARD MAY CAUSE SERIOUS INJURY OR DEATH.
The following procedures may expose you to dangerous line voltage. Use caution to avoid touching
live electrical contacts. Service must be performed by a trained, experienced service technician.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electric switch or use any phone in the building.
• Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's
instructions.
• If you can not contact your gas supplier, call the fire department.
Should overheating occur or the gas supply fail to shut off, do not turn off or disconnect the elec-
trical supply to the pump. Instead, shut off the gas at a location external to the applicance.
Do not use the boiler if any part of the gas control system has been under water. A qualified
service technician should inspect the boiler and replace any part of the control system and any
gas control which has been under water.
Use only your hand to turn the gas control knob. Never use tools. If the knob will not turn by hand,
don't try to repair it. Force or attempted repair may result in a fire or explosion.
XVI. TROUBLESHOOTING
SYSTEM STATUS
IBC is energized through 24 volt transformer.
IBC is not energized.
IBC receives more than 40 VAC.
IBC is energizing the draft inducer and air flow is proven.
Off during purge cycle - draft inducer is not powered on or air flow is not proven.
Off during igniter and run cycle - normal operation, purge cycle complete.
IBC is locked out. Problem could indicate false positive proof of air flow. Blocked vent,
intake air pipe, flue way, or orifice in negative pressure hose.
IBC is energizing igniter.
Igniter is not energized.
IBC is energizing gas control valve to open.
Gas control valve is closed.
IBC is locked out. Problem is flame has not been proven in three (3) ignition attempts.
May be due to broken igniter or lack of/low flame signal, or no gas.
Flame proven.
Checking for flame signal (during trial for ignition)
Flame unproven.
!
INDICATES
!
WARNING
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