SCP SCIENCE DigiPREP, Service Manual

Page: 9 / 88

KeyPad
Version 1.0
SCP SCIENCE
9
5. CPU and general component verifi cation
□
Software runs accordingly
• Software version _________
□
Fan is fi xed accordingly
• Controller serial number _________
SYMPTOMS
The following symptoms must be verifi ed before
going into more detail.
1. The block is over shooting the set point
temperature, and the temperature keeps
climbing;
• Check the Heater Drive Circuit
• Ensure correct block has been selected.
The voltage selector switch of the heating
block is in the correct position.
2. The block is not heating;
• Ensure the Digi
SET
dongle is installed.
• The power cable is connected.
• Ensure the Voltage Selector Switch of the
heating block is at the appropriate voltage.
• Verify that the 180
o
C NC Thermal Switch
is closed.
• Check resistance of heater according to
the Dig i
BLOCK
size.
• Verify the 450
o
C Thermostat is closed for
HT.
3. The block is heating very slowly;
• Ensure that the voltage selector switch of
the heating block is at the correct position.
• Ensure correct block has been selected.
4. No display and no back light;
• Check fuse F1.
• Check the 2 15A fuses inside the TS
housing.
Symptoms Reference
Operation LED not illuminated
when power is on
Page 26, 28,
36
Digital screen (LCD) is
malfunctioning
Page 36
LCD shows " Digi
PROBE
error"
page 28
KeyPad buttons are not
functioning correctly
Page 34, 78
The controller is not functioning
when power switch is on
Page 31
The Digi
PREP
block is not
heating up
The heating block is not
reaching its temperature or vary
FIGURE 1: SYMPTONS VS. DOCUMENT REFERENCES