Table of Contents
Advertisement
3
Troubleshooting
Table 3F Troubleshooting Chart - Noisy System
FAULT
- Supply
pressures should be between 4 inches w.c.
(1.0 kPa) and 14 inches w.c. and LP gas
pressures should be between 8 inches w.c.
(1.99 kPa) and 14 inches w.c. (3.5 kPa).
- Gas/air mixture problem.
Noisy
Operation
- Dirty/damaged burner.
- Air in the piping system.
- Dirt or debris caught in the air intake that may
be blocking inlet air.
- Blown fuse.
- Faulty pump.
No Pump
Operation -
Boiler Pump
- Internal fault on control board.
System Pump
or
- Faulty pump relay.
DHW Pump
- Incorrect parameter setting.
- Internal fault on control board.
No Blower
- Faulty blower.
Operation
- Faulty blower relay.
Relief Valve
- System pressure exceeds relief valve
Opening
setting.
44
CAUSE
gas
problem.
Natural
CORRECTIVE ACTION
gas
• Refer to Section 6 - Gas Connections of the Crest
Installation and Operation Manual for detailed
information concerning the gas supply.
• Refer to the Gas Valve Adjustment Procedure in this
manual for the proper gas valve setting. Verify that the
vent/air intake lengths do not exceed the maximum listed
in the General Venting section of the Crest Installation
and Operation Manual.
• Refer to this manual for the burner removal and
inspection procedure. Clean or replace the burner as
necessary.
• Properly purge all air from the piping system.
• Check or replace the filter.
• Replace fuse F4 on the control board.
• Replace pump.
• Replace main control board.
• Replace relay.
• Reference the Boiler Pump Mode and System
Pump Mode parameters in the Service section of this
manual.
• Replace control board.
• Replace blower.
• Replace relay.
• Lower the system pressure below the rating of
the supplied relief valve or replace the standard relief
valve with a higher rated valve up to the maximum
pressure of the heat exchanger 160 psi (40 kPa).
• Improperly sized expansion tank.
Service Manual
Advertisement
Table of Contents
