Lochinvar 2 Troubleshooting continued, Fault, Cause, Corrective Action, Noisy, Operation, No Pump

			Service Manual
3 Troubleshooting (continued)
Table 3F Troubleshooting Chart - Noisy System
FAULT	CAUSE		CORRECTIVE ACTION
	- Supply gas problem. Natural and LP gas	• Refer to Section 6 - Gas Connections of the Crest
	pressures should be between 4 inches w.c.	Installation and Operation Manual for detailed
	(1.0 kPa) and 14 inches w.c. (3.5 kPa).	information concerning the gas supply.
	- Gas/air mixture problem.	• Refer to the Gas Valve Adjustment Procedure on
		page 53 of this manual for the proper gas valve setting.
Noisy		Verify that the vent/air intake lengths do not exceed the
		maximum listed in the General Venting section of the
Operation
		Crest Installation and Operation Manual.
	- Dirty/damaged burner.	• Refer to page 34 in this manual for the burner removal
		and inspection procedure. Clean or replace the burner
		as necessary.
	- Air in the piping system.	• Properly purge all air from the piping system.
		• Replace fuse F4 on the control board, see page 36 of
	- Blown fuse.	this manual.
No Pump
	- Faulty pump.	• Replace pump.
Operation -
Boiler Pump		• Replace main control board.
System Pump	- Internal fault on control board.
or
HWG Pump	- Faulty pump relay.	• Replace relay.
		• Reference the Boiler Pump Mode and System
	- Incorrect parameter setting.	Pump Mode parameters in the Service section of this
		manual.
	- System pressure exceeds relief valve	• Lower the system pressure below the rating of
Relief Valve	setting.	the supplied relief valve or replace the standard relief
		valve with a higher rated valve up to the maximum
Opening		pressure of the heat exchanger 160 psi (40 kPa).
		• Improperly sized expansion tank.

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