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Cause
24V power supply
Wrong wiring
controller cooling
clogged
thermosensor
(thermoswitch)
Checkup
Check if the alarm disappears
when the power is turned on
with CONl, CON5, CONC and
CONCA disengaged.
Voltage is not output across
terminals A and B (at top of
FR-SFJ).
Check motor for load con-
dition.
2. Check frequency of start/
stop.
Fan does not run satisfac-
torily, or remains stopped.
Check cooling air flow.
Check if the thermosensor
does not reset when the mo-
tor fan is operated for
15 - 16 min. with the motor
Remedy
Remedy the 24V
power supply wir-
ing.
Jumper pin (Pin 4,
5) settings should,
meet input inter-
face for speed re-
ference and posi-
tion reference 12-
bit signals.
(Refer to the
standard specifi-
cation)
Remedy the wiring.
Lighten load.
1.
2. Reduce start/
stop frequency.
Replace the fan.
Clean the air in-
let.'
Shortcircuit
1.
continue opera-
tion (provi-
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Table of Contents
Troubleshooting
