Do System Tests to Identify Defective Components
120 810430 Troubleshooting Guide Powermax65/85/105 SYNC
Test 11 – Fan
Use this test if you have one of these conditions:
The system shows a 3-10-n fault code, which is related to the fan.
Nothing shows on the LCD screen after the plasma power supply is set to ON (I). This can
be an indication of a short-circuited fan.
1. Set the power switch on the plasma power supply to OFF (O), and disconnect the power cord.
2. Remove the plasma power supply cover and the component barrier.
3. Disconnect the inverter thermal sensor
from the power PCB, as follows:
J2 in Powermax65/85 SYNC CSA
models
J4 in Powermax65/85 SYNC
CE/CCC models
J2 in all Powermax105 SYNC
models
4. Put a jumper between pin 1 and pin 3 in
the receptacle for the inverter thermal
sensor.
5. Connect the power cord to the power
source, and set the power switch on the
plasma power supply to ON (I).
With the inverter thermal sensor disconnected, the fan operates as soon as the system is on.
6. Make sure that the fan stays connected to the power PCB, as follows:
J3 in Powermax65/85 SYNC CSA models
J5 in Powermax65/85 SYNC CE/CCC models
J1 in all Powermax105 SYNC models
WARNING
ELECTRIC SHOCK CAN KILL
The plasma power supply contains dangerous electric voltages that can seriously injure or
kill you.
Use extreme caution if you do service or maintenance work on a plasma power supply
when it is connected to an electric power source and the outer cover or panels are
removed.
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