Conair PCW-1.5 User Manual page 118

Alarm
Process Pump Overload alarm
OR
Recirculation pump overload
(dual pump option only)
6 - 3 0 l Tr o u b l e s h o o t i n g
P L C C o n t r o l A l a r m C o n d i t i o n s
Possible cause
Motor starter protector (MSP) set
incorrectly.
Low supply voltage
Faulty contactor.
Faulty MSP.
Control voltage is incorrect.
Solution
Check data tag in Electrical Cabinet.
Adjust overload accordingly. SEE
adjusting/Replacing MSP modules in T5
section. See How to properly set MSP
before replacing.
Ì
Check supply voltage. Supply volt-
age to contactor should be +/- 10%
of nameplate voltage.
Ì
Check wire terminations and connec-
tions at pump MSP contactor and
motor. Tighten if loose.
Check voltage between line and load
side of contactor. It should be less than 5
volt drop across the contactor. If it is not,
replace the contactor. See
Adjusting/Replacing the Contactor in the
MSP Troubleshooting section.
Check amp draw of circuit. If it is under
the rated setting, replace the MSP. See
Adjusting/Replacing MSP Modules, in
the Troubleshooting section.
24VDC required for contactor auxiliary
input. If control voltage is OK replace
PLC.