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OM-2233 Page 26
6-3. Troubleshooting Help Aids
. All directions are in reference to the
front of the unit. All circuitry referred to
is located inside the unit.
1 Output LED
2 High Temperature LED
The Output LED turns on when power is
turned on. The LED is also used to indicate
several machine malfunctions. When one
of the malfunctions listed below occurs, the
LED will first turn off for 1.5 seconds, and
then it will begin to blink. The number of
blinks corresponds to a Help message re-
lating to that malfunction. After the LED
blinks the appropriate number of times, the
LED will again turn off for 1.5 seconds, and
the sequence will start again.
The malfunctions that correspond to Help
2, 3, 4, 5, and 9 are thermal related. The
High Temperature LED turns on along with
the blinking Output LED.
A malfunction relating to Help 0 will cause
the the Output LED to turn off and stay off,
but the High Temperature LED turns on and
stays on.
Help 0 Display
Indicates a short in the thermal protection
circuitry located on the bottom heat sink.
Contact a Factory Authorized Service
Agent if this happens.
Help 1 Display
Indicates a malfunction in the primary pow-
er circuit caused by an overcurrent condi-
tion in the primary IGBT switching circuit.
Contact a Factory Authorized Service
Agent if this happens.
Help 2 Display
Indicates an open in the thermal protection
circuitry located on the bottom heat sink.
Contact a Factory Authorized Service
Agent if this happens.
Help 3 Display
Indicates the bottom heat sink has over-
heated. The unit has shut down to allow the
fan to cool it (see Section 4-3). Operation
will continue when the unit has cooled.
Help 4 Display
Indicates an open in the thermal protection
circuitry located on the top heat sink. Con-
tact a Factory Authorized Service Agent if
this happens.
Help 5 Display
Indicates the top heat sink has overheated.
The unit has shut down to allow the fan to
cool it (see Section 4-3). Operation will con-
tinue when the unit has cooled.
Help 8 Display
Indicates a malfunction in the secondary
power circuit of the unit. There is a high
open circuit condition. Contact a Factory
Authorized Service Agent if this happens.
Help 9 Display
Indicates a short in the thermal protection
circuitry located on the top heat sink. Con-
tact a factory Authorized Service Agent if
this happens.
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