Faults -8
Version 1.36
02/2004
Cooling errors
Cause Action Ref.
1. Peltier element defective Measure current of the element (3A at 11V). 5F-1 / PL-5
Replace if defective
2. Cooling fan defective Check the input voltage (CN7-2) and fan connectors 5F-1 / PL-5
Rear side of the machine.
3. Heat sink dirty Clean the heat sink and remove the cause of excessive 5F-2 / PL-5
dust. Check also the ventilation space.
4. Temperature sensor error Check the sensor at an ambient (room) temperature. 5F-2 / PL-5
(20-25°C/68-77°F = 6250-5000 Ohm) and replace if
necessary.
5. Wiring / control PCB Check the wiring/connectors. Check the 11V circuit 5K-5
defective (measuring point). Replace control PCB if necessary. 5K-1 / PL-2
6. Poor contact / conduction Check the torque (if the required tools are available) 5F-2 / PL-5
between cooling box, Peltier and apply conductive paste to the Peltier element.
element and heat sink
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