UGH004/0999 microKool Portable Chillers
TROUBLESHOOTING 6-13
CHECKING AND
REPLACING
FUSES
IMPORTANT:
Always
refer to the wiring dia-
grams that came with
your chiller to locate spe-
cific electrical compo-
nents. Illustrations in the
User Guide are intended
to be representative only.
This procedure covers the factory-installed fuses on the unit’s
motherboard. If you have installed an electrical disconnect or
emergency stop switch, additional fuses and/or breakers may
have been used elsewhere in the in the main power circuit.
To replace a blown fuse:
Disconnect and lockout the main power.
Open the electrical enclosure door.
Turn the screw
on the front panel counterclockwise to open.
Replace the fuse. The fuses are located on the mother-
board and are labeled and identified on the orange shield.
Close the electrical enclosure and restart the unit.
If fuses continue to fail:
❒ Verify that the unit is receiving the correct voltage.
Check the voltage, phasing and amperage ratings on
the unit’s nameplate.
❒ Verify that the unit’s transformer is operating correctly.
Check for proper voltage (120V 10%) to the voltage
sensing device for the fuse location.
❒ Check all wiring referencing the fusing location for
loose connections, damage or improper grounding.
Verify that the correct device is being used for this fuse
location. See
D
ISABLING OR
E
NABLING
O
UTPUT
M
ONITORS
in the
M
AINTENANCE
section.
1
2
3
4
