GE MAC 5500, Service Manual

Page: 85 / 180

Revision E MAC

5500 resting ECG analysis system 4-13

2020299-020
Troubleshooting: Diagnostic Tests
Battery Tests
NOTE
The minimum discharge capacity is 2000 mAH. Consider replacing the battery
if this number is less than 2000 mAH.
Battery Status
Displays, and constantly updates, the following information:
 Percent of charge remaining

Battery voltage (With a reading of 80% or more for percent of charge
remaining, the battery voltage should be between 15 and 24 volts. If battery
voltage is below 15 volts, the battery may need to be replaced.)
 Battery current

If battery current is less than -0.7 amps with AC power not applied, the main
CPU may need to be replaced.

(For example: Consider replacing the main CPU if the battery current is -0.8
amps with AC power not applied.)

Battery temperature.
 Maximum and minimum battery temperature

Ambient temperature (inside the unit).

If the ambient temperature (inside the unit) is more than 10

greater than the
current room temperature.

Maximum and minimum ambient temperature
 Current battery charging status
Battery Discharge Test
This test charges the battery to full capacity, if necessary, then monitors a discharge
cycle.
NOTE
To cancel the test at anytime, press the ESC key.
1. To perform the battery discharge test, plug the unit into AC (mains) power.
2. Select Battery Discharge Test . The battery discharge test window will appear
and the unit will begin to charge the battery.
3. Once the battery is fully charged, the message Turn the AC power to the unit
OFF! will appear.
4. Unplug the unit from AC (mains) power and select OK .
5. Re-select Battery Discharge Test . The battery will begin to discharge. When the
battery has fully discharged, the unit will shut off.
6. Reconnect the unit to AC power and turn the unit on. Go to Print Discharge
Test Results .
Monitored information, written to the internal memory, includes:

Discharge capacity (in mAH)