Thermal Arc POWERMASTER 320SP, Руководство по обслуживанию

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page 26
Temperature Monitoring
The temperature of the heat sink is constantly monitored via a temperaure sensor. This sensor is a temperature
dependent resistor (NTC = negative temperature coef
fi cient). The higher the temperature, the lower the resistance
value of the sensor.
Schematic
ϑ
ϑ
The DSP is monitoring the temperature of the heatsink and as soon as the temperature reaches the programmed
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 Tem-
peratures.
Maximum Temperatures
Machine type Temperature
320SP 77°C
400SP 80°C
500SP 75°C
If the temperature rises too fast, too high, the machine will stop and displays E04 (air cooling error).
There is a special overload program active in the DSP, which calculates and monitors the inside temperature of
the semiconductors (MOSFET power transistors). Before the inside temperature reaches a critical limit, the machi-
ne will stop and displays
E18 (Overload protection).
If a sensor has a short circuit, the machine will stop and displays E13 (temp. sensor error).
If the connection of the sensors to the MAPRO is interrupted (loose contact at any of the connectors), the machine
will stop and displays
E18 because the overload calculation is getting out off limits.