MYERS MP Series, Инструкция по установке, эксплуатации и обслуживанию

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If alarm or fault is present see 2.2.12 for alarms or 2.2.13 for faults. If a fault
persists when power is cycled by turning the AC breaker is off and back on
then the MP2000E is defective. Once the MP2000E is cycled off and then back
on allow 1 minute for the qualification process before checking if the unit is
on line.
•
If the unit is in line mode and not faults are present check that the line voltage
is supplied to the output by measuring the output line terminal with respect
to neutral. If voltage is not present then the MP2000E is defective.
b. Battery Charging Check
•
If the MP2000E is in line mode with no faults present the batteries should be
getting charged. In order to measure the charging current ensure the load is
powered by the utility line so there is no load current going through the
MP2000E. To check the charger operation measure the AC input current into
the MP2000E. If the battery voltage at the battery test point is less than 48VDC
then the charger should be in full operation. This should be seen by an AC
line current of approximately 4 amps. If a battery voltage is greater than
48VDC then the charger may be in float voltage operation. During float
voltage operation a fluctuating current will be seen in the AC line that will be
a low as zero and as high as 4 amps.
•
If the AC line current is less than 1 amp then the battery is not charging. This
can be caused by a faulty sensor. Shut the MP2000E off and remove the
battery temperature sensor. Check the probe tip to ensure it is not crushed,
inspect the wire for damage, and inspect the connector for corrosion. The
resistance of the probe should be approximately 10,000 ohms at 25
°
C, 20,000
at 10°C, and 5000 at 40°C.
•
If the sensor is OK check the temperature of the battery in the meter menu. If
the temperature of the battery is above 50
°
C then the unit will not charge.
c. Battery Backup Check
– Battery backup is tested by actuating a self test by shorting
the front panel control contacts 19 and 20 labeled self test, through the keypad self
test (see 2.2.9), or the RS232 menu under maintenance mode battery test (see
2.3.4.4). Once the MP2000E is placed in self test the MP2000E should transfer to
battery backup mode.
•
If the MP2000E exhibits a short circuit fault when transferring to battery
backup mode check the wiring to the load and ensure that the load is not too
large for the unit. Remove the load and retry the test if a short circuit appears
with no load connected then the MP2000E is defective.
•
If the MP2000E exhibits a Battery low voltage fault check the battery health
and the wiring connection from the MP2000E to the battery.
For additional troubleshooting information please see sections 1.6,
2.2.3, 2.2.4, and 2.4.3 of the manual.