Bedienungsanleitung A.O. Smith SGE 60 (Seite 98 von 118) (Englisch)

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Code and description Cause Measure

F04 (lock out error)

Three unsuccessful

ignition attempts.

No gas Open the main gas supply valve and/or

the manual gas supply valve before the

gas control valve

Check supply pressure to the gas control

valve

If necessary, restore the gas supply

•

Air in the gas pipes Bleed the air out of the gas pipe (see

section 7.9.2)

and measure the supply

pressure and burner pressure.

Defect in the hot surface igniter circuit Check that the hot surface igniter is

correctly connected (JP2).

Check the wiring of the hot surface

igniter.

Measure the resistance across the hot

surface igniter. This must lie between 2

and 10 Ohm (at room temperature).

Check that the hot surface igniter lights

up during ignition.

If necessary, replace the hot surface

igniter.

•

Defect in the ionisation circuit Check that the flame probe is correctly

connected (JP2)

Check the wiring of the flame probe

Measure the ionisation current. This must

be a minimum of 1.5 microA.

If necessary, replace the wiring.

•

Supply voltage too low Check the supply voltage, this must be 230

VAC(-15%, +10%)

F05 (lock out error)

Too many flame errors

have been signaled.

Incorrect roof or wall flue terminal.

Recirculating flue gases.

Check that the correct roof or wall flue

terminal has been installed (see section

7.7)

If necessary, install the correct roof or

wall flue terminal.

Check that the roof or wall flue terminal

discharges into a permitted area.

•

F06 (blocking error)

Short circuit between

flame probe and earth

Damaged cable in contact with metal

surface or bent flame probe.

Check the wiring and the flame probe.

Replace the wiring and/or flame probe if

necessary.

Ceramic part of the flame probe is

broken/cracked.

Check whether the ceramic part of the

flame probe is still intact, in the vicinity

of the air distribution plate of the burner.

If not the flame probe must be replaced.

•

F07 (lock out error)

A flame has been detected

after the gas control valve

was closed.

Defective gas control valves Check whether there is still burner

pressure present, after the gas control

valves have closed.

Check whether a flame is still present,

after the gas control valves have closed.

If this is the case, the gas control valve

must be replaced.

•

F08 (lock out error)

Error message from safety

relay

Flame detection before the gas control

valve opened.

Reset controller.

If the error appears again, replace the

controller.

•

F09 (lock out error)

Water temperature

protection.

Temperature at the top of the tank

exceeds 93 ºC.

Check that the circulation pump (if

present) is working

Check the position of temperature sensor

Reset controller

•

98 Installation, Maintenance and Service part

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A.O. Smith SGE 60 Seite 98

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