Roberts Gorden HF 30 v4 Installation, Commissioning, Service & User Instructions page 67

CABINET HEATER
9.6 Main Fan Circuit (Three Phase)
Main fan will not operate following
warm up period of heat exchanger
Fault lies elsewhere
Check for 400v three phase supply
at main terminals
Press in white button of fan/limit
Check for 230v at terminals 1 to N Fault lies elsewhere
thermostat and retest.
Check calibration of the fan
Check the setting of the
thermostat.
fan thermostat as in Section 5.1
The dial should indicate the approx.
temperature of the sampled air
Fan thermostat faulty.
Replace and reset.
Reset thermal overload and check
Check for 230v at coil terminals
setting. See Note 1.
of fan contactor
Contactor or overload faulty.
Check for 400v three phase at
Does fan run now ?
Replace as necessary.
input and output of contactor
Check and test wiring to motor.
Motor faulty.
Replace complete fan unit.
Thermal overload in motor faulty. Replace complete
Motor stops after running some time
fan unit (direct drive fans only)
MOTOR RUNNING