Pump cannot be turned off from the local keypad but stops when breaker is opened

Safety first: Isolate power at the main breaker before opening the control box. Verify absence of voltage.

• Inspect contactor: Locate the motor contactor in the Calpeda control box. Check if the contacts are welded by attempting to manually operate the contactor with power off. Replace if stuck.
• Check control wiring: Compare wiring to the Calpeda schematic. Look for unauthorized jumpers or miswired terminals that could bypass the stop circuit.
• Test stop circuit: With a multimeter, verify that the stop button and associated wiring correctly open the control circuit when pressed.
• Replace faulty relay/PCB: If the controller output remains energized even when a stop command is given, the internal relay or PCB may be defective and require replacement.