13
FAULT FINDING
Greenstar Ri Compact - 6 720 648 729 (2013/05)
7 FAULT FINDING
In the event that the boiler stops functioning or does not perform as expected, you can carry out a few simple checks. These checks
are some of the most common causes of apparent faults and are listed in the table below. Should the problem persist or other alert
codes are displayed, then it will be necessary to contact Worcester, Bosch Group.
Problem Cause Remedy
Operation/fault light (blue)
flashing
No gas supply/low gas supply pressure ▶ Contact your gas supplier.
Condensate outlet blocked
▶ If it is safe to do so, check your condensate pipe
outlet for blockages, such as ice or foreign
objects.
Flue blocked
▶ If it is safe to do so, check your flue outlet for
damage or blockages.
Desired room temperature is
not reached
Thermostatic radiator valve(s) set too
low
▶ Increase thermostatic radiator valve setting(s)
Temperature control for central heating
flow on boiler set too low
▶ Increase central heating flow temperature control
setting
Air trapped in heating system
▶ Bleed radiators and recharge heating system
Low system water pressure
▶ Re-pressurise the system, refer to page 11
Low temperature setting on the boiler
controls
▶ Increase settings on boiler controls
Desired room temperature too
high
Radiators are too hot ▶ Turn down thermostatic radiator valves/room
thermostat
▶ Reduce central heating temperature by turning
down the Central Heating control on boiler
Heating stays on for too long Clock is incorrectly set ▶ Check setting and adjust
No blue Operation/Fault
Indicator
Momentary power failure ▶ Disconnect boiler supply, wait a few seconds then
reconnect.
Table 2 Fault finding
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