Benchmark ZWB 7-29 CC1 Installation And Servicing page 96

Failure identification procedure
Condensation in the flue pipe
Check
1. Is diaphragm in mixer unit fitted cor-
rectly (see installation instructions)?
B Open mixer unit (29).
B Check diaphragm for correct ori-
entation, soiling and splitting.
3.4.2 Programmer faults
Set room temperature not reached (TR 2 and TR 212 E)
Check
1. Thermostatic valve(s) set too low?
2. CH flow temperature control on
boiler set too low?
3. Air in the heating system.
48
Action
B Fit diaphragm as per installation instructions or
replace.
B Close mixer unit.
Action
B Turn up thermostatic valve(s).
yes:
↓2.
↓2.
no:
B Turn up CH flow temperature control.
yes:
↓3.
no:
B Power OFF the appliance.
B Check appliance and system for water leaks and
repair as necessary.
B Top up system.
B Select Service Function 7.3 .
Select 1 (on, automatically deactivated) and con-
firm.
B Vent appliance.
B Vent radiators.
B Turn ON the appliance.
7 181 465 346 GB (03.02)