Lochinvar 1.5, 1.3 service manual Fault Cause Corrective Action

Page 41

 

 

 

 

 

 

Service Manual

 

 

 

 

 

 

 

 

 

 

 

 

3 Troubleshooting (continued)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 3D Troubleshooting Chart - Noisy System

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FAULT

CAUSE

 

CORRECTIVE ACTION

 

 

 

 

 

 

 

 

 

- Supply gas problem. Natural gas pressures

• Refer to Section 7 - Gas Connections of the Armor X2

 

 

should be between 4 inches w.c. (1.0 kPa)

Installation and Operation Manual for detailed

 

 

and 14 inches w.c. (3.5 kPa). LP gas

information concerning the gas supply.

 

 

 

 

pressures should be between 8 inches w.c.

 

 

 

 

 

 

 

 

 

(2.0 kPa) and 14 inches w.c. (3.2 kPa).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Refer to the Gas Valve Adjustment Procedure

on

 

 

 

 

page 50 of this manual for the proper gas valve setting.

 

 

- Gas/air mixture problem.

Verify that the vent/air intake lengths do not exceed the

 

 

 

 

maximum listed in the General Venting section of the

 

 

 

 

Armor X2 Installation and Operation Manual.

 

 

 

Noisy

 

 

 

 

 

 

• Refer to page 35 in this manual for the burner removal

 

Operation

- Dirty/damaged burner.

and inspection procedure. Clean or replace the burner

 

 

 

 

as necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Refer

to Section 6

-

System Piping

of

the

 

 

 

 

Armor X2 Installation and Operation Manual for

 

 

- Low water flow through the heat exchanger.

minimum flow rates. Verify that the water heater is piped

 

 

 

 

in a primary/secondary fashion and that the water heater

 

 

 

 

and system pump are running on a call for heat.

 

 

 

 

 

 

 

 

 

 

- 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

 

 

(82.7 kPa).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No Pump

- Blown fuse.

• Replace fuse F5 on the control board, see page 38 of

 

Operation -

 

 

this manual.

 

 

 

 

 

HW Pump

 

 

 

 

 

 

 

 

 

 

- Faulty pump.

• Replace pump.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Internal fault on control board.

• Replace main control board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Faulty pump relay.

• Replace relay.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Lower

the system pressure below the

150

psi

 

 

- System pressure exceeds relief valve

(1034.2 kPa) rating of the supplied relief valve.

 

 

 

 

setting.

• Improperly sized expansion tank.

 

 

 

Relief Valve

 

 

 

 

 

Opening

 

 

 

 

 

 

 

 

 

-Outlet temperature exceeds relief valve • Check temperature settings of the main control board. settings.

41

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Contents Models 1.0, 1.3, Contents Niosh stated First Aid Handling ceramic fiber materialsTroubleshooting ServiceMaintenance Armor X2 display Primary Smart Control Module Control inputsControl outputs Secondary Smart Touch Control Module PrimarySequence of operation General OperationHow the water heater operates Sequence of operation Sequence of operationParameter table This table lists the parameters and where to access themBMS Status Screen Viewable and changeable control parametersService Details Screen Service Main Screen Setup Screen Service/Setup Parameters Screen Service Set Point Parameters Screen Night Setback Parameters Screen Cascade Operation Cascade Parameters Screen10Vdc Operation 10Vdc BMS Parameters ScreenService Cascade Screen Service Temps Screen Burners Screen Graph Select Screen History Screen Service Mode Screen Maintenance Maintenance and annual startup Clean condensate trap Address reported problemsInspect water heater area Inspect water heater interiorCheck expansion tank Check water heater relief valve Flue vent system and air pipingCheck water system Check all water heater wiring Check ignition ground wiringCheck control settings Check flame signalOiled bearing circulators Cleaning water heater heat exchangerCheck Delta T Alarm Screen Troubleshooting Check control module fuses Before troubleshooting Check the following Troubleshooting Temperature Resistance Checking temperature sensorsFault Cause Corrective Action Condensate Flow SwitchDrain Blocked Flame outWhile Running Light cont’dFlame Lost High Limit Manual ResetCont’d High Limit / HEX Automatic ResetTemp SW Blower RPM’sToo High Louver Proving SwitchSensor Open Sensor ShortedAir Flow Too Resets Try LaterLow Flap ValveNo Error Stored Internal FaultWriting to MemosGas Valve Adjustment Combustion Analysis ProcedureOr Obstruction Gas Supply PressureModels 1.3 Gas valve adjustment procedureModel
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