SERVICING THE AT30
47
Error
Code
Meaning
Repair Procedure
E 08
Defective
temperature
compensation
probe
(continued)
Disconnect the wiring from the probe, and measure the resistance of the
probe with an Ohmmeter. The resistance should be approximately
10,000 Ohms at normal room temperature (77° F / 25° C). If the probe
reads open or shorted, it needs to be replaced.
If the probe checks good, examine the wiring between the probe and the
AT30. Also check the connection of the cable to the control circuit board
on the back of the front panel. If the wiring is OK, then the probe needs to
be replaced. Once you have replaced the probe, you must restart the
AT30 to activate temperature compensation.
E 09
Misadjusted
current limit
The output current limit is set at the factory to 110% of the rated output
current (e.g. for a 50 Adc charger, the current limit is set to 55 Adc). You
can adjust the current limit downward to as low as 50% of the output
current, if you have special requirements such as limited ac power
available. You should do this only if the normal dc load on the system is
smaller than the current limit.
If you do reduce the current limit setting below 100% of rated current,
your connected load might require more current than the charger can
deliver. If this happens, the battery will not charge properly. If this occurs,
the front panel displays the error code
E 09
. You should increase the
current limit setting so that the charger can supply all the current required
by the load, and still charge the battery. The current limit should be set to
at least 5% greater than the maximum continuous dc load current.
NOTE: The common alarm relay is not set for this condition.
E 10
Open internal
feedback loop
A redundant internal feedback loop (control loop) is provided as
redundancy, to increase reliability when remote sensing is used. If there
should be a problem with the internal loop wiring, the charger displays
E
10
. Check the internal wiring in the signal harness, especially wire #
50
.
Also check the harness connector (J25) on the Gate Driver circuit board
(A15).
E 11
Not used
This error code is not implemented at this time.
E 12
Defective
internal
thermostat
The AT30 rectifier heat sinks are equipped with over-temperature
thermostats. On startup, the AT30 tests the thermostats, and displays
E
12
if one or more are defective. You can check a thermostat by
disconnecting the wiring from the thermostat terminals, and measuring
continuity. The thermostat should be closed (NC) at normal room
temperature.
E 13
Internal over-
temperature
One or more of the internal rectifier thermostats has detected an over-
temperature condition. If the rectifier assembly is equipped with fans,
check all fans for proper operation. Also be sure that all enclosure vents
are clear of debris, and that the ambient temperature is below 50°C
(122°F).
E 14
forced load
sharing not
working properly
See Appendix F on page 92. Verify both chargers are functioning
properly. Ensure that the forced load sharing interconnection cable
assembly is not broken, is properly installed, and that the connector for
the Secondary charger has the jumper as described. Ensure that both
chargers are connected to the same ac supply and that source phase
rotation is the same for both chargers.
A 02
Equalize mode
inhibited
If you set the equalize timer to
zero
hours, the equalize mode is inhibited.
When you try to put the charger into equalize mode with a front panel
control, the display shows the message
A 02
. If you want to enable the
equalize mode, set the equalize timer to 1 or more hours.
Summary of Contents for AT30 SERIES
Page 99: ......
