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5 Maintenance
5.2 Troubleshooting
Most problems involve:
• Are the Input, Battery and Output circuit breakers switched on?
• Is the input voltage correct?
• Are the batteries expired?
If the unit fails to perform a specific function, Figure 5.1 lists typical symptoms, causes and
solutions, starting with the most obvious and working systematically. If you cannot resolve a
problem, contact Alpha's customer service department. The unit's electronics require no mainte-
nance.
Battery Lifetime
The maintenance-free batteries can be affected by: operating temperature; number of dis-
charges during the battery's life; charging characteristics and low voltage cutoffs. The unit com-
plies with the battery manufacturer's specifications for optimum performance and the longest
possible battery life.
In normal operation, the batteries may increase in capacity during the first three to twelve
months. After the first 10 to 15 discharges, the available backup power may increase by up to
20%. Once at this peak they slowly loose capacity and eventually cannot provide backup power.
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Troubleshooting Table
62
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Troubleshooting
