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.

 

 

 

 

 

 

 

39

Page 39
Image 39
Lochinvar 1.5, 3.5, 2.5 service manual No Pump

3, 2, 3.5, 2.5, 1.5 specifications

Lochinvar is a leader in manufacturing high-efficiency water heating solutions, and their Lochinvar 1.5, 1.3, and 1.0 models exemplify the company's commitment to innovation and performance. These advanced heating systems are designed to meet the diverse needs of commercial and residential applications, providing reliable hot water while ensuring energy efficiency and environmental sustainability.

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