VER-MAC PCMS Series - Page 56

Controller Cabinet Give us your thoughts
48 PCMS Operations, Safety & Maintenance V3.0 Ver-Mac 2018
Mode
Condition
Possible cause
Standby
No solar voltage reading on the controller
Serial communication defective or incorrectly
connected
Solar array disconnected
Standby
Over voltage from batteries (greater than
15.15V)
Batteries incorrectly connected
Example: 12V batteries in series
Defective solar regulator (U101, Q102)
Float
Battery voltage around
 14.45V at -25°C
 13.70V at 25°C
 12.95V at 50°C
OK
Bulk
No solar voltage reading on the controller
Serial communication defective or incorrectly
connected
Bulk
Controller displays solar voltage
(Example: 20.00V) but no solar current
One or more solar panels may be incorrectly
connected
Defective solar regulator (U101)
Bulk
Solar current (entering current) is less
than the battery current (outgoing current)
Solar regulator is OK but there is not enough
sunlight
Check orientation of the solar array
Solar regulator is OK but the system is drawing
too much current
Bulk
Solar current (entering current) is greater
than the battery current (outgoing current)
OK
LVD
Low Voltage Disconnect
Battery voltage too low
Off
System OFF and no LEDs lit on regulator
Defective jumper switch or wire in J5
Fuse F2 blown
(F1 replacement fuse)
Ground disconnected
Check J2-2