ZOLL Base Powercharger 4x4, Service Manual

Page: 37 / 75

FUNCTIONAL DESCRIPTION
IV-16
User Tests
This mode occurs only if the test button is activated for two seconds with no battery
installed. A self test will be performed which will include turning on all LED's for a brief
period of time. If successful, the
TESTING and BATT. READY indicator's will be turned
on for a few seconds. If a failure is detected, the FAULT indicator will be turned on and
left on. This test will also be run automatically after a battery is removed. The following
tests will be performed:
•
Timer Accuracy . Verify that the internal clock/timing function has not shifted
fundamental frequency.
•
Memory Validity . Verify that all of the imbedded processor's internal memory
locations (RAM and ROM) are functional.
•
Power Supply Accuracy . Verify that the logic power supply is within tolerance.
•
Charger voltage control test. Verify CC and CV voltage levels
Run Time Tests
The controller will perform a series of internal tests to insure safe operation. Some of
these tests will be performed continuously. Other tests will be performed at the
appropriate moment of run time operation. A summary follows;
•
Power Supply accuracy . Verify that the power supply is within tolerance.
•
OverCharge Timer test . Performed during the CV/CC charge sequence. Limit the
amount of time battery is subjected to charge to less than 4 AH.
•
Battery Voltage validity . Performed during the CC charge sequence. Verify that
the battery is within acceptable voltage limits.
•
Charge Current validity . Performed during the CC charge sequence. Verify that
the charge current is within acceptable limits.
•
Temperature validity . Performed continuously. Verify that the temperature is within
acceptable limits. If temperature is too high or too low the controller will disable
constant current charging and will turn the FAULT indicator on.
•
Embedded Processor Operation . Performed continuously. Verify that the
processor is properly executing its program.
If any of these tests fail, the controller will either be disabled or will revert to the Fault
mode.
For those faults in which the microprocessor is still functional, CV charge operation will
be maintained. Except for a battery voltage failure the microprocessor will continuously
attempt fault recovery. In the event of a battery voltage failure the microprocessor will
stay in the fault mode until the battery is removed.
If the microprocessor is disabled the charge circuitry will revert to CV charge operation
and the FAULT indicator will flash to indicate this condition to the user.