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2.4
Alarms
The MXHF includes comprehensive protection and alarm monitoring. The alarms are graded into Urgent and
Non-urgent alarms.
Urgent
alarms
indicate a dangerous condition that immediately stops the charge cycle.
Non-urgent alarms
are indicated on the LCD and are logged in the alarm log but do not actually stop the
charge cycle.
2.4.1 Charger Related Alarms
Main Switch
<Urgent> shows the status of the front panel start/stop toggle switch.
Inlet Filter
<Non-urgent> can give a warning as to when the inlet filter needs servicing but is not enabled by
default.
Low Mains
<Non-urgent> gives an indication of variation in the input mains voltage without actually affecting
the ability of the charger to provide rated output. It might also indicate that a Power Module is being
overloaded.
Mains Fail
<Urgent> a mains loss situation and the charge cannot proceed.
Non-Urgent Rectifier Fail
<Non-urgent> there is a power module that is not providing output, the Charger is
still operating but redundancy has been lost. Reduced power output and longer charge time as a result.
Urgent Rectifier Fail
<Urgent> if the number of power modules not providing output equals or exceeds the
setting for urgent module count in the PC application monitor tab then the charger will stop. If the urgent
module count is set to one then the Charger is configured without redundancy and a single fault will stop the
charge.
Rectifier Over Temperature
<Urgent> normally related to a blocked filter, restricted exhaust air or
installation in an inappropriate location.
Configuration Error
<Urgent> the Charger cannot meet the target current required by the controller even
with all fitted power modules operating. The configuration does not meet the limits set for a 10A or 15A mains
input hardware limited charger.
Output Fuse
<Urgent> a blown fuse in nearly all cases is caused by connecting a reverse polarity battery to
the Charger. When a fuse is blown check all cells for a reversed cable connection, a common problem with first
charge of shift batteries that have not been previously tested in a lift truck. After replacing a battery or Charger
cable always check the polarity before plugging the battery into the Charger.
No Output Current
<Urgent> the charger is not providing the expected output current. Generally related to a
premature disconnection of the battery, but also could be an incorrectly inserted power module.
Monitor ADC Fail
<Urgent> the internal watchdog of the MPC35s micro-controller is indicating a major fault
and potential unpredictable behavior if the Charger is left running.
