INSTRUCTIONS FOR INSTALLATION
We reserve the right of alternations
Page
19
Domestic hot water is
working but
central heating
is not working
Is the relay RCH
in ON possition?
Is the votage
present on CH
pump therminals?
NO
YES
NO
Please check the following
before going through Fault
finding chart.
Check the installation is
correct.
All isolating valves are open.
The system is full of water
(pressurised) and purged of
air.
Programmer and controls
outside of boiler are on.
Check the electrical supply is
connected correctly and
present
YES
Find and restore
break of connection
Are the parameters
for central heating on
control panel or/and external
programmer
correct?
Change parameters
NO
YES
Check external
programmer / room
thermostat
NO
Change the
relay RCH
YES
Change the CH pump
Is the voltage
present on terminals
a1(L) and a2(N)
of relay RCH?
All manuals and user guides at all-guides.com
