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Worcester-Bosch Greenstar i Manual

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Fault finding
Greenstar i ErP – 6 720 806 946 (2015/03)
7Fault finding
In the event that the appliance stops functioning or does not perform as expected, please see table below These problems are some
of the most common causes. Should the problem persist or if other fault codes are displayed, then it will be necessary to contact
Worcester, Bosch Group.
This table gives information on basic operating system problems.
Problem Cause Remedy
EA fault code flashing on
display
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 appliance set too low
▶ Increase central heating flow temperature
control setting.
Low temperature setting on the room
thermostat
▶ Increase setting on the room thermostat.
Air trapped in heating system ▶ Bleed radiators and re-pressurise the heating
system.
Low system water pressure ▶ Re-pressurise the system, refer to page 19.
Desired room temperature
too high
Thermostatic radiator valves are set to high ▶ Turn down thermostatic radiator valves.
Room thermostat is set too high ▶ Turn down room thermostat.
Radiators are too hot Temperature control on appliance set too
high
▶Reduce central heating temperature by turning
down the Central Heating control on appliance.
Note: This could prevent your property reaching
the desired temperature during cold weather
periods.
Heating stays on for too long Clock is incorrectly set ▶ Check clock setting and adjust.
No blue Operation/Fault
Indicator demand
Momentary power failure ▶ Disconnect appliance supply, wait a few seconds
then reconnect.
Heat requirement demand operation light
has been deactivated
▶ Ask your installer to reactivate the blue light
Hot water temperature too
low
Temperature set too low on appliance
controls
▶ Check setting and adjust.
Water flow at tap too high ▶ Reduce flow rate at tap.
Air trapped in heating system ▶ Bleed radiators and re-pressurise the heating
system.
Low system water pressure ▶ Re-pressurise the system, refer to page 19.
Hot water temperature too
high
Temperature set too high on appliance
controls
▶ Check setting and adjust.
Water flow at tap too low ▶ Increase flow rate at tap.
Table 6 Fault finding
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