A
LARM
C
ONDITIONS
CONT
’
D
UGH017/0500
Series 1 Portable Chillers, PLC Control
T
ROUBLESHOOTING
6-13
Alarm
ALM 06
Pump Overload
alarm
Possible cause
Overload set incorrectly.
Low supply voltage.
Faulty contactor
Faulty overload module.
Solution
Check table on wiring diagram
for correct full load amperage
draw. Adjust overload accord-
ingly.
❏
Check supply voltage.
Supply voltage to contactor
should be +- 10% of name-
plate voltage.
❏
Check wire terminations
and connections. Tighten if
loose.
Check line and load side of
contactor. There should be less
than a 5 volt drop across the
contactor. If there is not,
replace the contactor. See
Replacing the Contactor
in the
Troubleshooting section.
Check amp draw of circuit. If
it is under the rated setting,
replace the overload module.
See
Replacing Overload
Modules
, in the
Troubleshooting section.
