Warning

Maintenance may only be performed by a qualified service and maintenance engineer.

Table 10.2 Displayed errors (Sheet 6 of 10)

is

Code + Description

Possible cause

Solution

Remark

 

 

 

 

 

F05 (lock out error)

Incorrect roof or wall

1.

Check that the correct roof or wall terminal has been fitted. See

If the error cannot be resolved or is persistent, contact your

Too many flame errors

terminal.

 

’3.9 Air supply and flue gas discharge’.

installer.

Recirculating flue

 

 

 

have been signalled.

2.

If necessary, install the correct roof or wall terminal.

 

 

gases.

3.

Check that the roof or wall terminal discharges into a permitted

 

 

 

 

 

 

 

area.

 

 

 

 

 

F06 (lock out error)

Damaged cable in

Check the wiring of the ionisation rod. If necessary, replace the

If the error persists, contact your installer.

Short circuit between

contact with metal

wiring.

To replace the necessary parts, you must contact your installer.

ionisation rod and

surface.

 

 

 

earth

 

 

 

 

Ceramic part of the

1.

Check whether the ceramic part of the ionisation rod is still

 

 

 

 

ionisation rod is

 

intact, in the vicinity of the air distribution plate of the burner.

 

 

broken/cracked.

2.

If this is not the case, the ionisation rod must be replaced.

 

 

 

 

 

 

 

 

 

F07 (lock out error)

Defective gas valves.

1.

Check whether there is still burner pressure present, after the

If the error cannot be resolved or is persistent, contact your

A flame has been

 

 

gas valves have closed.

installer.

 

 

 

To replace the necessary parts, you must contact your installer.

detected after the gas

 

2.

Check whether a flame is still present, after the gas valves

valve was closed.

 

 

have closed.

 

 

 

3.

If this is the case, then the gas control must be replaced.

 

 

 

 

 

 

F08 (lock out error)

Flame detection

1.

Reset ThermoControl.

If the error cannot be resolved or is persistent, contact your

Error message from

before gas valve

2.

If the error appears again, replace ThermoControl.

installer.

opened.

To replace the necessary parts, you must contact your installer.

safety relay.

 

 

 

 

 

 

 

Release R.1.3 UK

78

Page 78
Image 78
A.O. Smith 28 30 50 60 ’3.9 Air supply and flue gas discharge’, F06 lock out error, F07 lock out error, F08 lock out error