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
(CB1) trips rectifier diode
immediately
or SCR in
module
2. Defective
wiring to
transformer or
rectifier
3. Defective
transformer
AC breaker 1. Loose
(CB1) trips connection to
after a few breaker/fuse
minutes
2. Wrong ac
voltage, or T1
taps mis-wired
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 the control
board to discharge internal voltages. Open the ac input circuit
breaker (CB1) and disconnect all plugs on the Main Control
PC Board (A1). Keep power removed for approximately 5
minutes to allow voltages to discharge. Reconnect & restart.
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. 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 connections to the ac input circuit breaker (CB1)
and/or optional ac input fuses (F1A/F1B/F1C). Tighten as
required.
2. Confirm the transformer primary taps (T1-H#) are wired
correctly for your ac input voltage supply. See Section 1.6 for
details.
3. Use a clamp-on ammeter to measure the current in wires
# 7, # 8 & # 9 (between the transformer and rectifier). If it less
than 50% of the dc output current, one of the six (6) SCRs is
defective. Replace rectifier modules (A16x) as needed.
4. Disconnect the wire harness plug from connector J26 on the
top of the Gate Driver PC Board (A15). Restart the AT30. If
you are able to measure output current, one of the SCRs is
defective. Test and replace rectifier modules (A16x) as
needed.
SERVICING THE AT30
Ω
. If resistance
49