Benchmark ZWB 7-29 CC1 Installation And Servicing page 87

FA
and
Although appliance switches off, flame still detected
Check
1. Condensation trap blocked?
2. Electrode assembly defective?
B Power OFF the appliance.
B Remove electrode assembly.
Electrode assembly burnt out?
3. Problem with flue?
B Check CO
level in combustion
2
air.
Is CO level above 0,2 % ?
2
4. The gas valve is damaged.
7 181 465 346 GB (03.02)
flashing.
yes:
no:
yes:
no:
yes:
no:
Failure identification procedure
Action
B Note the setting of the temperature controls
and .
B Power OFF the appliance.
B Clean condensation trap discharge pipe.
B Press
, restart the appliance.
FA? ↓2.
↓2.
B Replace electrode assembly.
B Turn ON the appliance.
B Press
, restart the appliance.
FA?
B Power OFF the appliance.
↓3.
B Refit electrode assembly.
B Turn ON the appliance.
B Press
, restart the appliance.
FA? ↓3.
B Check flue and repair or replace if necessary.
B Press
, restart the appliance.
FA?
B Power OFF the appliance.
↓4.
↓4.
B Change the gas valve.
B Turn ON the appliance.
B Press
, restart the appliance.
FA?
B Power OFF the appliance.
↓5.
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