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Disconnect and lockout the main power.
Open the electrical enclosure door.
Turn the screw
on the front panel counterclockwise to open.
Locate the pump overload module attached
to the pump motor starter.
Disconnect the three power leads from the over-
load module to the pump motor. Note the placement of
each lead and label as needed.
Disconnect auxiliary wiring on
the overload module.
Remove the overload module.
Loosen the three screws that connect
the overload module to the motor con-
tactor. Pull the overload module down
to release it from the starter.
Reverse these steps to install
the new overload module.
Set the module reset mode to
M for manual.
Set the proper FLA trip point.
Do not exceed the FLA for the pump
motor.
microKool Portable Chillers UGH004/0999
6-14 TROUBLESHOOTING
RESETTING
OVERLOADS
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The pump motor overload is located inside the unit’s electri-
cal enclosure.
Disconnect and lockout the main power.
Open the electrical enclosure door.
Turn the
screw on the front panel counterclockwise to open.
Check the overload.
If the yellow button is out, the
overload has tripped. Press the
blue button to reset the overload.
Verify that the overload trip point
does not exceed the FLA for the
pump.
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2
3
MOTOR CON-
Motor overload
REPLACING THE
PUMP OVERLOAD
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