Roberts Gorden CTCU 27 - Manual (Page 31)

SECTION 14: T ROUBLESHOOTING
25
14.4 Troubleshooting for Solenoid Valves
14.5 Troubleshooting for Main Fan
Valve faulty.
Replace with one of
correct type.
Fault elsewhere.
If problems persist, contact
Roberts-Gordon Ltd. at
Tel: +44 (0) 1902 498733
www.rg-inc.com
Valve Operating
TROUBLESHOOT ENDS.
No
Yes
Valve or ignition control
faulty. Replace with
one of correct type.
Does gas pressure at
outlet of valve return to zero or
lower when valve turns off?
No
Yes
Does gas pressure at outlet
of the valve rise when
valve turns on?
No
Yes
Is gas pressure at inlet of the
valve correct for gas type?
Note pressure found.
No
Yes
START
If problems persist, contact
Roberts-Gordon Ltd. at
Tel: +44 (0) 1902 498733
www.rg-inc.com
Fan Operating
TROUBLESHOOT ENDS. No
Fan motor faulty.
Replace with correct type.
Is there 230 V between
terminals L 1 and N?
Replace fan
delay thermostat.
Replace fan
delay thermostat.
Is power supply 230 V at
terminals T 1 to N?
No
Yes
START
Does fan turn on and
off while burner is firing
continously?
No
Yes
Does fan run
automatically?
No
Yes
Yes
For your safety and optimum heater performance, use only genuine ROBERTS GORDON ® replacement
parts.
Conduct Commissioning procedure as shown
on Page 15, Section 10.