Troubleshooting
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02.20
909.2710.1-06
9
Troubleshooting
9.1
Monitoring temperature
The temperature of the heat sink is constantly monitored via a temperaure sensor. This sensor is a tem-
perature dependent resistor (NTC = negative temperature coefficient). The higher the temperature, the
lower the resistance value of the sensor.
Schematic
DCDRV1
ϑ
X3/2
X3/1
X1/12
X1/4
DP-MAPRO
X1/12
X1/4
+3.3V
DCDRV2
ϑ
X3/2
X3/1
X1/12
X1/4
X4/12
X4/4
+3.3V
DSP
(Process)
Fig. 38:
Temperature monitoring
The DSP is monitoring the temperature of the heatsink and as soon as the temperature reaches the pro-
grammed maximum value, the machine will stop and displays
E01
(thermal overload).
The actual value of the temperature can be displayed at the front panel in menu Extras, Diagnosis, Module
Temperatures.
Machine type
max. Temperature
S3, S3 mobile, P3000 mobile, P3500
77°C
S5, P4500
80°C
S8, P5500
75°C
Tab. 30:
Maximum temperatures
If the connection of the sensors to the MAPRO is interrupted (loose contact at any of the connectors), the
machine will stop after some time and displays
E13
, because a rise of the temperature can not be detected.
There is a special overload program active in the DSP, which calculates and monitors the inside tempera-
ture of the semiconductors (MOSFET power transistors). Before the inside temperature reaches a critical
limit, the machine will stop and displays
E18
(Overload protection).
