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LAARS EDN Series - Users Manual User Manual

Page 8

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H2314700B

FOR SERVICE

Contact your installing contractor, gas utility, Laars
dealer, or call Laars for the nearest authorized
representative in your area.

1G. Trouble Shooting – Fault Codes

The Endurance boiler uses an electronic boiler

controller that shows operation information and fault

codes in a three-character alphanumeric display.

Boiler Operation Information

default display = supply temperature, the temperature

of the water leaving the boiler heat exchanger

rtn =

return temperature, the temperature of the

water entering the boiler heat exchanger

tnt =

tank temperature, the temperature of the water

in the transfer tank (EBP only)

dt =

delta tee, the difference in temperature

between the inlet and outlet of the boiler heat

exchanger

Oat = outdoor air temperature, the temperature at the

outdoor air sensor, if outdoor reset is used.

CSP = calculated setpoint, the calculated boiler

supply temperature, if outdoor reset is used.

Boiler Control Fault Codes

F1 =

Boiler control internal error. Switch off boiler

and restart. If F1 repeats, replace boiler

control.

F3 =

Gas valve status is on, with no call for heat.

This is an indication of a wiring error or a

seized relay. Check relay first, and then boiler

wiring.

F4 =

Supply sensor error. Check for damaged

wiring or poor connection first. Check sensor

resistance per installation manual.

F5 =

Tank sensor error (EBP only). Check for

damaged wiring or poor connection first.

Check sensor resistance per installation

manual.

F6 =

Return sensor error. Check for damaged

wiring or poor connection first. Check sensor

resistance per installation manual.

F8 =

Outdoor air sensor error. Check for damaged

wiring or poor connection first. Check sensor

resistance per installation manual.

LO =

Lockout. Many conditions can cause a boiler

lockout. See boiler manual for possible

causes and resolution.

OFF = Controller is off. Press and hold the upper left

(power) button on the boiler control for 3

seconds.

ICE = Low temperature protection – boiler has

detected water temperature below 39°F (4°C),

and will attempt to run the boiler’s circulator.

Correct low temperature situation to avoid

freezing conditions. Although the pump

attempts to run, the Endurance boiler cannot

prevent boiler or system freeze-up. When

water freezes, it expands, and this expansion

can burst pipes and cause damage to the

boiler, or to the pipes and components

throughout the whole heating system

A subsidiary of

BRADFORD WHITE Corporation

20 Industrial Way, Rochester, NH 03867

• 603.335.6300 • Fax 603.335.3355

1355 Kuehner Drive, Simi Valley, CA 93063

• 800.900.9276 • Fax 800.559.1583

(Sales, Service)

480 S. Service Rd. West, Oakville, Ontario, Canada L6K 2H4

• 905.844.8233 • Fax 905.844.2635

www.Laars.com

Litho in U.S.A. © Laars Heating Systems 0705 Document 1192B

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