Lochinvar Understanding the Water Heater Reset Button and Troubleshooting
Page 28

Service Manual

3Troubleshooting

Table 3E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface

FAULT

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

• Verify that the system is full of water and that all air

 

 

has been properly purged from the system.

 

 

• Verify that the water heater is piped properly into the

 

 

heating system. Refer to Section 6 - System Piping

 

 

of the Armor Water Heater Installation and Operation

Manual Reset

 

Manual for the proper piping methods for the Armor

 

water heater.

 

 

High Limit

 

 

 

 

• Check 120 VAC to water heater pump motor on a call

(will require a manual

 

 

for heat. If voltage is not present, check wiring back

reset once the condition

The outlet water temperature has exceeded

to the main control board.

 

 

has been corrected. Press

the fixed setting of the manual reset high

 

 

 

 

 

 

the RESET button on the

limit.

• Replace the main control board if necessary.

SMART SYSTEM display

 

• If 120 VAC is present on a call for heat and the water

to reset.)

 

heater pump is not operating, replace the pump.

 

 

• If the manual reset high limit has tripped, check

 

 

setting of the device.

 

 

 

 

• Check resistance of water sensors and compare to

 

 

Table 3B on page 23 of this manual. Replace sensor

 

 

if necessary.

 

 

 

 

• Replace high limit.

 

 

 

 

 

 

 

• Vent/air intake lengths exceed the maximum allowed

 

The actual fan RPM is 30% lower than what

lengths. Refer to Section 3 - General Venting of the

Fan Low

is being called for.

Armor

Water Heater Installation

and

Operation

Manual for proper lengths.

 

 

OR

 

 

 

 

 

 

 

 

Fan Speed Low

 

• Check for obstruction or blockage in the vent/air

(will require a manual

 

intake pipes or at terminations.

 

 

 

 

 

 

 

reset once the condition

 

• Check the wiring connections at the fan and at the

has been corrected. Press

 

main control board.

 

 

the RESET button on the

 

• Replace the fan.

 

 

SMART SYSTEM display

 

 

 

 

• Replace the main control board.

 

 

to reset.)

 

 

 

 

 

 

 

 

 

Blown fuse.

• Replace fuse F4 on the control board, see page 21 of

 

this manual.

 

 

 

 

 

 

 

 

 

 

 

• Check the wiring connections to switch. Wires should

 

 

be connected to the common and normally closed

 

 

terminals.

 

 

 

 

• Air intake lengths exceed the maximum allowed

 

 

lengths. Refer to Section 3 - General Venting of the

APS

 

Armor

Water Heater Installation

and

Operation

 

Manual for proper lengths.

 

 

Open

 

 

 

 

• Check

for obstruction or blockage

in the

air intake

(will require a manual

 

 

pipes or at terminations.

 

 

reset once the condition

 

 

 

Air pressure switch contacts are open.

• Check reference hoses connected to the air pressure

has been corrected. Press

 

the RESET button on the

 

switch for blockage or obstruction.

 

 

SMART SYSTEM display

 

• Inspect the burner. Reference page 19 of this manual

to reset.)

 

 

for removal and cleaning procedures.

Replace if

 

 

necessary.

 

 

 

 

• Inspect the heat exchanger. Reference page 20 of

 

 

this manual for removal and cleaning procedures.

 

 

Replace if necessary.

 

 

 

 

• Faulty air pressure switch. Replace switch.

 

 

 

 

 

 

28

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Contents Models 150 Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid What is in this manual? ServiceMaintenance TroubleshootingService Armor water heater displayControl inputs Control outputs General Operation How the water heater operatesSequence of operation Saving parametersSequence of operation Display panel menu access Use this procedure to access menus from the display panelDisplay panel parameter access Button Operation Display CommentsParameter table WHRViewable and changeable control parameters Not used Data loggingFunctions WHR settingsNot used Control modes Service Notification Circulation pumpsService technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Flue vent system and air piping Check water systemCheck expansion tank Check water heater relief valveCheck ignition ground wiring Check all water heater wiringCheck control settings Perform start-up and checksCheck flame signal Cleaning water heater heat exchangerReview with owner Oiled bearing circulatorsTroubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit Does NotChecking temperature sensors Temperature F Resistance ΩNoisy Operation No PumpRelief Valve OpeningFlow Switch FlameSequence GV/RelayNo Flame Ign No Flame RunningManual Reset High LimitFan Low Fan Speed LowFan High Fan Speed HighSensor Open Sensor ShortedParameters Rem Ctrl FltProgr Service Blk Watch Dog ErrorNo Error Stored Low 24 VACCombustion Analysis Procedure Gas Valve AdjustmentOr Obstruction Gas Supply PressureModels 150 Gas valve adjustment procedureModel Page

150 - 500 specifications

Lochinvar has established itself as a leader in the field of hydronic heating solutions, and the Lochinvar 150 - 500 series is a prime example of its commitment to innovation and efficiency. Designed primarily for commercial applications, this line of high-efficiency boilers is engineered to provide optimized performance, reliability, and cost-effectiveness.

One of the standout features of the Lochinvar 150 - 500 series is its robust construction. Built with a durable stainless-steel heat exchanger, these boilers offer superior resistance to corrosion, ensuring a longer lifespan and consistent performance over time. The advanced design of the heat exchanger also maximizes heat transfer, contributing to higher efficiency ratings.

In terms of technology, the Lochinvar 150 - 500 series incorporates the Concentric Venting System, which allows for flexible installation options and reduces the overall footprint required for the boiler setup. This system is particularly advantageous in commercial settings where space can be limited. The boilers are equipped with smart controls that provide real-time monitoring and diagnostics, allowing for easier maintenance and reducing downtime.

The series features a comprehensive modulation range, allowing the boilers to adjust their output based on the heating demand. This capability not only enhances efficiency but also lowers energy consumption, making it an eco-friendly choice for businesses seeking to reduce their environmental impact. The Lochinvar 150 - 500 boilers utilize innovative combustion technologies, including an integrated burner that ensures optimal combustion efficiency and reduced emissions.

Safety is a priority with the Lochinvar 150 - 500 series, which includes multiple safety features such as lockout protection, pressure switches, and high-temperature limit controls. These measures ensure that the unit operates safely under varying conditions, providing peace of mind for operators.

Additionally, the compact design of the Lochinvar 150 - 500 series allows for easy transportation and installation. Its lightweight structure enables it to be maneuvered through tight spaces typically found in commercial buildings, making it a versatile option for installers.

In summary, the Lochinvar 150 - 500 series is an excellent choice for anyone seeking a reliable, efficient, and technologically advanced boiler solution. With its durable construction, advanced features, and commitment to safety and efficiency, this series stands out as a trusted option in the competitive market of hydronic heating systems.
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