Troubleshooting Chart Begins On - HindlePower AT30 SERIES Operating And Service Instructions

3.4. TROUBLESHOOTING CHART
PROBABLE
SYMPTOM
CAUSE
Front panel 1. An external
meter surge has
displays all interrupted
segments on
operation of the
or all microprocessor
segments off
or the display
controller.
AT30 may
have no
output
AC breaker 1. Shorted
trips (or fuses rectifier diode
clear) or SCR
immediately
2. Defective
wiring to T1 or
to rectifier
bridge
3. Defective
transformer T1
AC breaker 1. Loose
trips (or fuses connection to
clear) after a breaker/fuse
few minutes
2. Wrong ac
voltage, or T1
taps miswired
3. Open SCR
4. SCR not
controllable
RECOMMENDED ACTION
1A. Soft Reset of control board by pressing S7 reset switch.
S7 is located inside the charger, on the control board's right
edge (as viewed from the rear of the front panel). This will
restart the control board without modifying any settings.
1B. Hard Reset of control board by pressing and holding the
UP button on the front instrument panel, and simultaneously
pressing S7 reset switch. This will restart the control board and
restore all settings to factory default. Reset parameters per
Section 2.3 of this manual.
1C. Remove all power from the AT30 to allow control board to
discharge all voltages. This can be done by opening the AC
circuit breaker and disconnecting the control board plug(s).
Keep power removed for approximately five (5) minutes to
allow voltages to discharge.
1. Disconnect wires # 7, 8 & 9 at the three (3) heat sink-
mounted rectifier modules (A16x), or at the main power
transformer (T1-X1/X2/X3). Measure the resistance between
the ac (bottom) terminals of the rectifier module(s), checking
both polarities. It should be at least 100,000
is low in any direction, replace the rectifier module(s) (A16x)
as needed.
2. Check spacing of terminals and check wiring for signs of
insulation damage, burns, etc. Repair as necessary.
3. Test by disconnecting wires # 7, 8 & 9 from the transformer
secondary taps (T1-X1, X2 and X3). If ac breaker still trips,
test by disconnecting wires # 42, 43, 44, 45, 35 and 36 from
the tertiary taps (T1-Y0, Y1, Y2, Y3, W1 and W2). If ac breaker
still trips, replace the transformer (T1).
1. Check and tighten connections as required.
2. Be sure the transformer primary taps (T1-H1, H2 and H3)
are wired correctly for your input voltage. See Section 1.6 for
details.
3. Use a clamp-on ammeter to measure the current in wires #
7, 8 & 9, between T1 and the rectifier modules. If it less than
50% of the dc output current, one of the six (6) SCRs or
diodes is defective. Replace the rectifier module(s) (A16).
4. Disconnect the wire harness plug from connector J26 on the
top of the Gate Driver PC Board (A15) and restart the AT30. If
you are able to measure output current, one of the SCRs is
defective. Test and replace the rectifier module(s) (A16) as
needed.
SERVICING THE AT30
Ω
. If resistance
49