Lochinvar ARMOR 151 - 801 - Manual (Page 27)

3
Troubleshooting
(continued)
27
Service Manual
Table 3E Troubleshooting Chart - Noisy System
FAULT CAUSE CORRECTIVE ACTION
Noisy
Operation
- Supply gas problem. Natural gas pressures
should be between 4 inches w.c. and
14 inches w.c. LP gas pressures should
be between 8 inches w.c. and
14 inches w.c. • Refer to Section 7 - Gas Connections of the Armor
Water Heater Installation and Operation Manual for
detailed information concerning the gas supply.
- Gas/air mixture problem.
• Refer to the Gas Valve Adjustment Procedure on
pages 37-38 of 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 Armor Water Heater Installation and
Operation Manual.
- Dirty/damaged burner.
• Refer to page 22 in this manual for the burner removal
and inspection procedure. Clean or replace the burner
as necessary.
- Low water flow through the heat exchanger.
• Refer to Section 6 - System Piping of the Armor Water
Heater Installation and Operation Manual for minimum
flow rates.
- Air in the piping system. • Properly purge all air from the piping system.
- Low system water pressure. • Verify system pressure is a minimum of 12 PSI.
No Pump
Operation
- Blown fuse.
• Replace fuse F1 on the control board, see page 24 of
this manual.
- Faulty pump. • Replace pump.
- Faulty pump relay. • Replace pump relay.
- Internal fault on control board. • Replace main control board.
Relief Valve
Opening
- System pressure exceeds relief valve
setting.
• Lower the system pressure below the 150 PSI rating of
the supplied relief valve.