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14.7 Troubleshooting for Main Fan (3 Ø)
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.
(direct drive fans only)
Motor faulty.
Replace complete fan unit.
Contactor or overload faulty.
Replace as necessary.
Check and test wiring to
motor.
Ye s
No
Check for 400 V three phase
at input and output of
contactor.
Ye s
No
No
Does fan run now?
Motor stops after running
some time.
Reset thermal overload
and check setting. See
page 28, Section 10.1.6.
Check for 230 V at coil
terminals
of fan contactor.
Fan thermostat faulty.
Replace and reset.
Check calibration of the
fan thermostat.
The dial should indicate
the approximate
temperature of the
sampled air.
Ye s
No
Check the setting of the
fan thermostat as in
Section 5.1.
Fault lies elsewhere.
Fault lies elsewhere.
Ye s
No
Press in white button
of fan/limit thermostat
and retest.
Ye s
No
No
Check for 230 V at terminals
1 to N
Ye s
No
Ye s
START
Main fan will not operate
following warm up
period of heat exchanger.
Check for 400 V three phase
supply at main terminals.
For your safety and optimum heater performance, use only ROBERTS GORDON
®
replacement parts.
Conduct Commissioning procedure as on Page 33, Section 10.