Set Room Temperature Exceeded By Large Amount; Temperature Rises Instead Of Falling; Room Temperature Too High In Economy Mode; Incorrect Or No Modulation - Worcester ZSBR 7-28 ICS1 Service Booklet

Set room temperature exceeded by large amount

Check
1. Do radiators get too hot?
2. Bad choice of location for program-
mer, e.g. outside wall, near window,
in draught, on hollow wall, etc.
3.
1) See installation instructions

Temperature rises instead of falling

Check
Timer clock (DT 2) incorrectly set

Room temperature too high in Economy mode

Check
Building retains heat well

Incorrect or no modulation

Check
Programmer incorrectly wired
7 181 465 347 (01.07)
Action
yes: TR 2:
B Decrease setting of "Heating" control
↓2.
↓2.
no:
B Select better installation location
yes:
↓3.
↓3.
no:
B Turn down thermostatic valve(s).n
Action
B Check setting and correct as necessary.
Action
B Set economy temperature lower.
yes:
-or-
B Set earlier start time for Economy mode.
Action
B Check wiring against wiring diagram and correct
as necessary.
Rectifying faults
1)
.
43