Bosch WORCESTER Greenstar Heatslave II External 12/18 Installation, Commissioning And Servicing Instructions page 64

If the boiler does not give complete satisfaction, before
calling for a service engineer, the installer should check the follow-
ing:
General checks
1. Is there 230 V across the boiler live and neutral terminals?
2. Is the polarity correct? (230 V across live and earth, 0 V across neutral
and earth).
3. Is the air bled from the primary system?
4. Is the air bled from the oil supply?
5. If the flue sized and routed correctly?
Boiler runs straight to lockout
1. Has the oil line been purged of air?
2. Where an air eliminator is used in conjunction with a top feed oil tank
the non-return valve, (if fitted), should be removed from the oil dip
pipe.
Boiler locks out at the start of a demand
(Heating off over night for example)
1. If an air eliminator is being used, check that there are no leaks that
allow air to be pulled into the oil supply.
2. If a two pipe oil supply is a being used, has a non-return valve been fit-
ted to the inlet pipe? Refer to the instructions for guidelines.
No domestic hot water
1. Is the mains water in connected to the 15 mm isolation valve?
2. Is there a domestic hot water demand from the programmer and has
the tank reached temperature?
No domestic hot water (external programmer)
3. Is there 230 V on LR for DHW (tap symbol)?
4. Refit link between 230V OUT and LR for DHW.
If the DHW now operates correctly there is a problem with the external
programmer and/or its wiring.
No central heating
1. Are both programmer and room thermostat on demand for central
heating?
2. Is the room thermostat wired correctly?
No central heating (external programmer)
1. Is there 230 V on LR for Central Heating (radiator symbol)?
2. Refit link between 230V OUT and LR on the Central heating
If the Central Heating now operates correctly there is a problem with
the external programmer and/or its wiring.
Under no circumstances must an appliance be left
to operate with any control linked out or over
ridden.
Worcester, Bosch Group
Cotswold Way, Warndon, Worcester WR4 9SW.
Tel. 0330 123 9559
Worcester, Bosch Group is a brand name of Bosch Thermotechnology Ltd.
worcester-bosch.co.uk
6 721 843 980 (2022/01)
WORCESTER, BOSCH GROUP:
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