18Réf. : CH - 1254 - I - 0 - EN
START
Is the “Power On” neon
illuminated ?
Is there 230V at SWL & N
on terminal strip?
Electrical fault external to
boiler
Is there permanent live
to the boiler?
Is there 230V at L & N
connections on the neon?
Internal electrical fault on
boiler
Replace neon
Check supply from
external controls
Does the On/Off button
illuminate when pressed in?
Is there 230V at L & N of
the On/Off button?
Check boiler internal
wiring
Replace On/Off Button
CARRY OUT THE FOLLOWING PRELIMINARY CHECKS BEFORE
COMMENCING FAULT FINDING
1. Check that gas, water and electrical supplies are available at the boiler.
Electrical supply = 230V ~ 50 Hz. The preferred minimum gas pressure is
19.5mbar (natural gas).
2. Carry out electrical system checks, i.e. Ground Continuity, Resistance to
Ground, Short Circuit and Polarity with a suitable meter. Note: Repeat these
checks after servicing or fault finding.
3. Ensure all external controls are calling for heat and check all external and
internal fuses. Before servicing or replacement of parts ensure the gas and
electrical supplies are isolated.
YES
NO NO
NO
NO
NO
YES
YES
YES
YESYES
NO
To Next Page
Loading...
