Fault Finding - Benchmark RD 532i Installation And Servicing Instructions

5

Fault finding

Problem
Desired room
temperature is not
reached
Desired room
temperature
exceeded by large
amount
Temperature rises
instead
of falling
Room tempera-
ture too high in
Economy mode
No display or dis-
play unit does not
respond
Storage Tank
doesn't warm up
6 720 610 604 GB (03.06)
Cause
Thermostatic
valve(s) set too
low
Temperature con-
trol for CH flow
set too low
Air trapped in
heating system
Radiators are too
hot
Clock is incor-
rectly set
Building retains
heat well
Momentary power
failure
Temperature con-
trol is too low
Fault finding
Remedy
Increase thermo-
static valve set-
ting(s)
Increase CH flow
temperature con-
trol setting
Bleed radiators
and heating sys-
tem
Turn down ther-
mostatic valves
Check setting
Start Economy
mode sooner
Switch off appli-
ance at master
switch, wait a few
seconds and
switch on again
Turn the tempera-
ture control to the
desired tempera-
ture
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