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14.5 Troubleshooting for Solenoid Valves Circuit
14.6 Troubleshooting for Main Fan Circuit (1 Ø)
Fault lies elsewhere.
Investigate and correct.
Valve faulty.
Replace with correct type.
Ye s
No
Is there an electrical supply
to the valve terminals?
Valve faulty.
Replace with correct type.
Fault lies elsewhere.
Investigate and correct.
Valve Operating
TROUBLESHOOT ENDS.
If problems persist, contact
ROBERTS GORDON
®
at
Tel: +44 (0)121 506 7709
www.rg-inc.com
No
Ye s
Does valve open at the
correct time?
No
Ye s Ye s
START
No
No
Is there pressure on the
outlet of the valve when the
valve should be closed?
Is there an electrical supply
to the valve terminals?
Motor running.
TROUBLESHOOT ENDS.
If problems persist, contact
ROBERTS GORDON
®
at
Tel: +44 (0)121 506 7709
www.rg-inc.com
No
Thermal overload in motor
is faulty.
Replace complete fan unit.
Ye s
No
Motor stops after running
some time.
Fan thermostat faulty.
Replace and reset.
Check calibration of the
fan thermostat.
The dial should indicate
the approximate
temperature of the
sampled air.
Fault lies elsewhere.
Ye s
No
Re check supply to
terminals L1 to N.
Ye s
No
Check the setting of the
fan thermostat as in
Figure 13.
Ye s
No
Check and test wiring to
motor. Does the motor run
now?
Motor faulty.
Replace complete fan unit.
Ye s
Ye s
START
No
No
Main fan will not operate
following warm up
period of heat exchanger.
Check for 230 V
at terminals 1 to N.
Press in white button
of fan/limit thermostat
and retest.
For your safety and optimum heater performance, use only ROBERTS GORDON
®
replacement parts.
Conduct Commissioning procedure as shown on Page 33, Section 10.