Cleaver-Brooks PCS140e.1, Installation Operation User Manual, Page: 21 / 28

PCS140e.1
750-329 19
CHAPTER 5 - MAINTENANCE AND TROUBLESHOOTING
Very little maintenance should be required for the PCS140e.1. A basic troubleshooting table is shown
below.
Basic Troubleshooting - PCS140e.1
Problem Possible Cause Action
No display at HMI Power Failure
Check supply voltage to the panel is 120
VAC +/- 10%
Check supply voltage to the HMI is 24 VDC
Tripped circuit
breaker or blown fuse
Check circuit breaker and fuses inside the
control panel. 24 VDC power supply should
have a green LED to indicate power
I/O Failure Alarms
Blown Fuse/Power
Failure
Check that the 24 VDC power supply is on. A
green LED should be lit to indicate power.
Replace fuse or power supply if necessary.
Signal Polarity
Reversed
Check signal from the transmitter. Verify that
the transmitter is wired correctly. Reverse the
signal wires if necessary.
Transmitter Problem
Check signal from the transmitter. Verify that
the signal corresponds to the water pressure
in the header. Replace transmitter.
Pump not running
Pump not in a running
sequence position
Check the sequence position of the pump.
The lead pump should always be running.
Other pumps are started and stopped
according to header pressure demand.
Wrong Switch
Position
Check H-O-A switch position. The switches
should be in the ‘Auto’ position.
No Motor Power
Check for voltage at the pump motor. Verify
that all disconnects are on.
No Control Power
Check that the relay in the control panel and
the starter at the MCC are both pulled in.
Verify 120 VAC power across the control
circuit. Replace fuses or control transformer.
Starter Failure
Check that the pump starter has power at the
coil. Replace starter.
Relay Failure
Check that the pump relay has 24 VDC
power at the coil. Replace relay.
Low Tank Level
Check that there is adequate water level in
the tank. Verify that CR-6 is energized.