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User's Manual ver. 2.0
11. Maintenance
11.1 Trouble Shooting
Small problems sometimes can be solved locally with the help of the below tab of trouble shooting.
If you don't succeed, contact us or your nearest distributor.
Symptom
Indication on
front unit
Green LED is
always light off.
Green LED (PW)
light on and
green LED (ON)
in light off
Thyristor unit
condition.
doesn't go in
conduction with
Green LED (PW)
input signal.
in light on
condition and
green LED (ON)
in light on
condition.
Load current
Green LED (ON)
flows also with
always in light
no input signal.
off condition.
Current flows at
Yellow HB in light
nominal value
on condition.
but yellow LED
(HB) in light on
condition.
R
LED (SC)
Red LED in light
ED
on condition.
IS LIGHTED ALSO
IF CURRENT IS AT
.
NOMINAL VALUE
Thyristor unit
doesn't work
properly.
CD3200 up to110A
Possible reasons of
the symptom
No voltage auxiliary
-
power supply to
terminals 1-3 (see
wiring diagram).
No input signal.
-
Reversed polarities of
-
input signal.
Reset contact in open
-
condition (see wiring
diagram).
Fuse failure.
-
Load failure.
-
Load connection
-
interruption.
Thyristor faulty and
-
always in open
circuit.
With HB option the
-
yellow led (HB) in
light on condition.
Short circuit on
-
thyristor. If there is
HB circuit the red
LED (SC) is light on.
HB circuit not tuned.
-
Current transformers
-
not properly wired (if
are external to
CD3200).
HB circuit not
-
properly tuned.
Wrong input signal
-
selection.
Wrong input signal
-
calibration (out of
range).
Auxiliary voltage
-
supply out of limits.
51
Actions
Give auxiliary voltage supply
-
to terminals 1-3.
Provide to give input signal.
-
Reverse the input signal
-
polarity.
Make link on reset terminals.
-
Substitute the fuse.
-
Repair the load.
-
Provide to repair the wiring.
-
Substitute the faulty thyristor.
-
Check the load.
-
Substitute the thyristor. Check
-
that load is not in short
circuit.
Push CAL button in front unit
-
to start HB calibration
procedure.
Control current transformers
-
wiring and Push CAL button in
front unit to start HB
calibration procedure.
Push CAL button in front unit
-
to start HB calibration
procedure.
Control input signal setting.
-
Repeat input calibration
-
procedure.
Verify the auxiliary voltage
-
supply.
www.honeywell.com/imc
Honeywell
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