R
EPLACING
O
VERLOAD
M
ODULES
UGH017/0500
Series 1 Portable Chillers, PLC Control
T
ROUBLESHOOTING
6-23
Always refer to the wiring dia-
grams you received with your
chiller to locate specific elec-
trical components.
Normally if the overload trips, resetting the overload and cor-
recting the cause is typically all that is needed. However, if the
overload continues to trip, it may be necessary to replace the
overload module.
To replace the overload module:
Disconnect and lockout power to the chiller.
Open the electrical enclosure.
Locate the overload module and disconnect
the power leads from the module to the device. Refer to
the wiring diagram for the exact location. Note the place-
ment of each lead and label as needed.
Disconnect auxiliary wiring to the module.
Loosen the screws and remove the module.
Install the new module
and tighten in place with the screws.
Reconnect wires and leads.
Adjust setting to correct Full Load Amps
rating of compressor, fan or pump.
Restore power to the chiller.
WARNING: Electrical hazard
Before performing any work on this unit, discon-
nect and lock out electrical power sources to
prevent injury from unexpected energization or
startup.
1
2
3
4
5
6
7
8
9
Pump overload
module (MSP2)
Compressor over-
load module (MSP1)
