HindlePower AT30 SERIES Operating And Service Instructions page 59

PROBABLE
SYMPTOM
CAUSE
Lamp test key 1. No Vac
does not work,
2. Main Control
or some lamps
PC Board (A1) is
do not light
not secured to
front panel
3. Defective
Main Control PC
Board (A1)
One or more 1. Front panel is
front panel locked
keys do not
2. Main Ctrl PCB
work
is not secured to
front panel
3. Defective
Main Control PC
Board (A1)
Two AT30.s 1. If the forced
connected in load sharing
parallel, but option is not
only one has supplied, check
output current for normal
operation of
both chargers
2. EJ5126-##
option
HIGH DC 1. HDCV alarm
VOLTAGE and Equalize
indicator is on voltage settings
are mismatched
2. Defective
rectifier bridge
3. Defective
Main Control PC
Board (A1)
No alarm, but 1. Output current
output voltage is below 2%
is above High
DC Voltage
2. Defective
setting
Main Control PC
Board (A1)
RECOMMENDED ACTION
1. The lamp test key does not work during an ac power failure.
2. Open the front panel, and make sure that the Main Control PC
Board (A1) is securely mounted on the standoffs on the back of
the panel. All indicators should extend about 0.125in / 3.18mm
through the front of the panel.
3. When you press the LAMP TEST key, if some but not all
indicators light, or the digital meter does not display "8888",
replace the Main Control PC Board (A1).
1. Open the front panel, and be sure that jumper (J9) on the Main
Control PC Board (A1) is in the ENABLE position.
2. Open the front panel, and be sure that the Main Control PC
Board (A1) is firmly seated on the standoffs on the back of the
panel. Front panel keys must operate freely.
3. Turn off both front panel breakers. If the AT30 does not have
breakers (fuses instead), lock out ac and dc power to the AT30
externally. Wait one minute. Return dc power to the AT30 first,
followed by ac power. If some of the front panel keys still do not
work, replace the Main Control PC Board (A1).
1. Multiple AT30s are not designed to share load current, without
the optional forced load sharing kit (EJ5126-##) installed. When
two or more AT30s are connected in parallel without this option, it
is normal for one of the units to have no output current. You can
check the operation of the "off" charger by increasing its Float
voltage until it starts to deliver output current. When you have
finished the test, be sure both AT30s are set to the same Float
and Equalize voltages.
2. See Appendix F on page 92 for troubleshooting of Forced Load
Sharing feature.
1. Be sure that the High DC Voltage alarm setting is higher than
the Equalize voltage setting. See Sections 2.3.2 and 2.3.4.
2. 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. Replace the rectifier module(s) (A16) as needed.
3. Turn off both front panel breakers. If the AT30 does not have
breakers (fuses instead), lock out ac and dc power to the AT30
externally. Wait one minute. Return dc power to the AT30 first,
followed by ac power. If the AT30 output voltage is normal, but
the HIGH DC VOLTAGE indicator is still on, replace the Main
Control PC Board (A1).
1. Output current must be greater than 2% of rated current to
produce a High DC Voltage alarm. See Parallel Operation portion
in Section 2.3.6.
2. Turn off both front panel breakers. If the AT30 does not have
breakers (fuses instead), lock out ac and dc power to the AT30
externally. Wait one minute. Return dc power to the AT30 first,
followed by ac power. If the AT30 output voltage is above the
alarm setting, but the HIGH DC VOLTAGE indicator still does not
light, replace the Main Control PC Board (A1).
SERVICING THE AT30
55