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microKool Portable Chillers UGH004/0999
6-12 TROUBLESHOOTING
CHILLER
WILL NOT
POWER UP
If you apply power to the chiller and the control panel does not
light, you have a problem with the main power circuit or the
unit’s microprocessor board.
WARNING: Electrical Shock Hazard
Disconnect and lockout the main power supply
before proceeding.
Symptom
Applying power
does not turn on
the chiller or light
the control panel.
The control panel is
lit, but the chiller
will not operate
when RUN is
pressed.
Possible cause
Is power reaching the
chiller?
Has the unit blown a
fuse?
Is the correct voltage
reaching the chiller?
Is the unit in Test Mode?
Solution
❒ Verify that the main power
supply and any customer-
installed electrical discon-
nect or emergency stop
devices are in the ON posi-
tion.
❒ Verify correct electrical con-
nections between the unit
and the control, and
between the unit and the
power supply. Replace any
damaged wires or cables.
Check Fuse 1 on the mother-
board and any fuses or breakers
associated with customer-
installed disconnect devices.
Replace or reset as required.
Identify the cause of the ground
fault and correct it. See
C
HECK
-
ING AND
R
EPLACING
F
USES
.
Check the electrical require-
ments on the unit nameplate.
Verify correct main supply
voltage to the unit and the sec-
ondary voltage supply from the
transformer to unit compo-
nents. Replace the transformer,
if necessary.
If the Test Mode LED is lit,
you must disable Test Mode on
the motherboard before resum-
ing operation. See
P
ERFORMING
S
YSTEM
T
ESTS
in the
M
AINTENANCE
section.