5 Maintenance
64
Alpha Technologies
5.4 Replacing the Internal Batteries (Continued)
Step 2: Charger Voltage Test
This tests the unit’s charger so the new batteries will not damaged by a faulty charger. Do
this before removing the batteries.
Procedure:
1
Make sure:
•
The Battery circuit breaker is switched off.
•
The Input circuit breaker is switched on.
•
The utility line is connected.
2
Measure the DC voltage by:
3
The voltage should be between 54 VDC to 57 VDC.
•
If it is, switch off the Input circuit breaker and disconnect the utility line.
•
If it is not, the charger is faulty. Contact Alpha Technologies customer service de-
partment.
Charger Voltage Test Finished. Go to Step 3.
Figure 5.2
Charger Voltage Test
TO BATTERIES
RE
L
A
Y
TERM
IN
AL
BLOC
K
RED WIRES
1) CONNECT POSITIVE (+) TO EITHER RED WIRE TERMINAL.
2) CONNECT NEGATIVE (-) TO THE UPS’S CHASSIS.
3) IF VOLTAGE IS BETWEEN 54 AND 57VDC, THE BATTERY
CHARGER IS OK.
IF IT ISN’T, CONTACT ALPHA TECHNOLOGIES CUSTOMER
SERVICE DEPARTMENT.
BA
T
T
ER
IE
S
UPS FR
ONT
TRANSFORMER
