Service Manual

3 Troubleshooting

Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

 

 

 

 

Automatic Reset High Limit:

 

 

 

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

 

 

 

has been properly purged from the system.

 

 

 

• Verify that the boiler is piped properly into the heating

 

 

 

system. Refer to Section 6 - Hydronic Piping of the

 

 

 

SYNC Installation and Operation Manual

 

 

 

for the proper piping methods for the SYNC.

 

 

 

• Check voltage to boiler pump motor on a call for

 

 

 

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

 

 

 

the pump relay.

 

 

 

• Replace the pump relay if necessary.

 

 

 

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

 

 

 

pump is not operating, replace the pump.

Automatic Reset

 

 

• If the system pump is a variable speed pump, ensure

High Limit / HEX-

 

 

that the system flow is not less than the boiler flow.

Temp SW

Either the auto-reset high limit (optional),

• If operating on either an inlet or system supply

(will require a manual

reset once the condition

or the O-temp heat exchanger switch as

sensor, check temperature setting of the main control

board.

has been corrected. Press

opened.

 

 

• If the high limit has tripped, check setting of the

the RESET button on the

 

 

display to reset.)

 

 

device.

 

 

 

 

 

 

• Check resistance of water sensors and compare to

 

 

 

Table 3B on page 45 of this manual. Replace sensor

 

 

 

if necessary.

 

 

 

• Replace high limit.

 

 

 

 

 

 

 

HEX Temp SW:

 

 

 

• Check continuity across two contacts. Wires should

 

 

 

be connected at both poles of normally closed switch.

 

 

 

• Inspect the rear of the inner combustion chamber

 

 

 

at the burner level, for refractory breakdown/missing.

 

 

 

Replace the refractory if no damage to the heat

 

 

 

exchanger as a result of the burner, otherwise,

 

 

 

replace the heat exchanger.

 

 

 

• Faulty O-temp heat exchanger switch. Replace

 

 

 

switch.

 

 

 

 

 

 

 

• Vent/air intake lengths exceed the maximum allowed

 

 

 

lengths. Refer to Section 2 - General Venting of the

 

 

 

SYNC Installation and Operation Manual for

Blower RPM’s

The actual fan rpm is 30% lower than what

proper lengths.

• Check for obstruction or blockage in the vent/air

Too Low

is being called for.

Reference the Burners

Screen information

on page 32 of this

intake pipes or at terminations.

(will require a manual

• Check the wiring connections at the fan and at the

manual.

 

reset once the condition

 

has been corrected. Press

 

 

main control board.

 

 

• Replace the fan.

the RESET button on the

 

 

display to reset.)

 

 

• Replace the main control board.

 

 

 

 

 

 

 

 

Blown fuse.

 

• Replace fuse F4 on the control board, see page 43 of

 

 

this manual.

 

 

 

 

 

 

 

50

Page 49 Page 51
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Lochinvar 1.3 service manual Automatic Reset, High Limit / HEX, Temp SW, Blower RPM’s, Too Low
Page 49 Page 51

1.3, 1 specifications

Lochinvar 1 is a remarkable achievement in the realm of modern technology and engineering. As a powerful and efficient water heater, it has been designed to cater to a wide range of residential and commercial needs. One of the standout features of Lochinvar 1 is its advanced heating technology, which incorporates a high-efficiency condensing design. This technology allows the unit to achieve impressive energy savings by maximizing heat transfer while minimizing energy consumption.

The Lochinvar 1 utilizes a stainless steel heat exchanger that enhances durability and corrosion resistance. This not only extends the lifespan of the unit but also ensures consistent performance over time. Coupled with a user-friendly control system, users can easily adjust settings and monitor performance, enhancing overall convenience and usability.

Another key characteristic of the Lochinvar 1 is its compact design, making it suitable for a variety of installation environments. Whether in a residential basement or a commercial utility room, the unit’s space-saving configuration allows for efficient use of available area without compromising on capability.

Safety features are integral to the Lochinvar 1, providing peace of mind for users. The unit is equipped with advanced monitoring systems that can detect irregularities and automatically shut down the system if necessary. This not only protects the equipment but also enhances the safety of the environment in which it operates.

In terms of performance, Lochinvar 1 boasts a high recovery rate, ensuring hot water is available on demand. This is particularly beneficial for settings with high water usage, allowing simultaneous operations without lag.

Moreover, the unit supports various venting options, offering flexibility during installation. Whether using traditional vertical venting or innovations like direct venting, Lochinvar 1 accommodates different building designs and local codes, making it highly versatile.

In conclusion, Lochinvar 1 epitomizes the melding of efficiency, reliability, and user-friendly technology. With its high-performance features, robust safety systems, and adaptable installation options, it stands out as a forefront player in the water heating industry, meeting the diverse needs of today's consumers and businesses alike.
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