Keston C40 - Gas Leak or Fault; BENCHMARK INITIATIVE

Low water pressureE 44
Return thermistor open circuit - check/replace connections/thermistorE 37
Flow thermistor open circuit - check/replace connections/thermistorE 36
Return thermistor short circuit - check/replace connections/thermistorE 32
Flow thermistor short circuit - check/replace connections/thermistorE 31
Difference between flow and return temperatures too high. Check circulation.E 30
Flow temperature increased too quickly. Check water circulation.E 25
Maximum return temperature exceeded. Check circulation.E 19
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Gas Leak or Fault
If you suspect a gas leak turn off the appliance
immediately, turn off the gas tap to the appliance
and contact your local gas region without delay.
If you suspect a fault with the appliance it must not be used until the fault has
been corrected by a competent person.
In the unlikely event of a breakdown consult your Installer or Service Engineer and
advise the fault display and description of fault.
BENCHMARK INITIATIVE
As part of the industry wide “Benchmark” Initiative all C40 and C55 boilers now include a Benchmark
Installation, Commissioning and Service Record Log Book. This log book should be completed by
your installer at the end of the installation and commissioning process. The details of the Log Book
will be required in the event of and warranty work being required. There is also a section to be
completed after each regular service visit.
This log book should be kept in a safe place for the life of the boiler.
The boiler should be installed and serviced only by CORGI registered operatives. All CORGI
registered Installers carry a CORGI ID card, and have a registration number. Both should be
recorded in your Benchmark Log Book. You can check your installer by calling CORGI direct on
01256 372300.
WD274/1/2002
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