8
c.
RS485:
To enable external control pump running capacity, connect terminal A and B, via
Modbus485 communication protocol.
8. TROUBLE SHOOTING
Problem
Corrective solution
Pump Does Not Start
•Power Supply fault, disconnected or defective wiring
• Fuses blown or thermal overload open
• Check the rotation of the motor shaft for free movement and
lack of obstruction.
• Motor windings burned out.
Pump Won't Prime
•Empty pump/strainer housing. Make sure the pump/strainer
housing is filled with water and the cover o ring is clean.
•Loose connections on the suction side.
•Strainer basket or skimmer basket loaded with debris.
•Suction side clogged.
Low Water Flow
•Pump is not primed
Relay external control output
Display board
RS485
Summary of Contents for GFVS19N
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