2 - 7
Section Two
16)
Replace the Interface/
ILD Card.
Does the fault disappear?
YES NO
12)
Disconnect all control signal
plugs on the control card.
Does the fault disappear?
NO YES
10)
Is the correct line voltage
present on the input terminals?
L1/R (91), L2/S (92), L3/T (93)
YES NO
9)
Symptom
No information in display
11)
Check Input Disconnect
and fusing.
If fuses are blown, check
for a short circuit in the
Power Section.
13)
The fault may be caused
by a short circuit in the
control signals.
Check control wiring for
proper connection.
15)
Test the soft charge
circuit, input rectifier,
and DC Bus capacitors.
17)
Replace the Control Card.
Does the fault disappear?
NO YES
Resume operation
YES NO
Resume operation
Replace the
Relay Card
– +
– +
14)
Is the DC Bus voltage OK? Should read 1.4 x the AC line V.
Measure the DC Bus voltage between terminal +VDC and –VDC.
Also refer to pages 3-1 and 3-2.
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