Micro
ARE-M Series 24V Chargers, Single Phase
Maintenance
PM990-1070-24, Issue 12
6-4
TABLE 6-1 TROUBLESHOOTING CHART
Symptom
Possible Cause(s)
Solution(s)
A. AC breaker trips
1. Short circuit in AC power circuit.
Inspect primary wiring for possible
shorts or grounded connections.
2. Input connected for lower voltage.
a.
Check position of jumpers.
Consult connection diagram.
b.
Measure input voltage.
3. High voltage shutdown operating.
Remove load and check for high
voltage.
4. Input voltage outside ANSI range.
Measure input voltage.
5. Frequency of supply less than 57
Hz.
Check input frequency.
6. Short in transformer winding.
Visually inspect power transformer
primary coils for signs of overheating.
B. No DC output.
1. AC power outage.
Check for AC voltage on both sides of
the breaker.
2. Short circuit in DC power circuit.
a.
Inspect secondary power wiring
and terminals for shorts or
grounded connections.
b.
Check power charger diodes.
c.
Check for shorted DC filter
capacitors.
3. Open circuit.
Check all wiring for open or loose
connections.
C. Low DC output voltage.
Check voltage at DC output
terminals with a portable meter.
1. Short in resonant circuit.
a.
Check triac.
b.
Check resonant capacitor.
c.
Check resonant circuit wiring.
2. Open sensing leads.
Check wiring for continuity.
3. Unit in current limit.
Adjust current limit setting.
4. Component failure in interface
board.
Replace interface board.
5. Component failure in control board. Replace control board.
6. Defective ribbon cable.
Replace ribbon cable.
7. Out of adjustment.
Adjust float voltage.
D. High DC output voltage.
1. Open triac in resonant circuit.
Check triac.
2. Open sensing leads.
Check for DC voltage across Control
Board Pins J5-3and J5-6
3. Interface board failure.
Replace interface board.
4. Control board failure.
Replace control board.
E. DC breaker trips.
1. Battery connection reversed.
Check polarity of battery connections.
2. Short circuit in DC power circuit.
a.
Inspect secondary power wiring
and terminals for possible shorts
or grounded connections.
b.
Check power charger diodes and
DC filter capacitors.
