Manitowoc MII 302 Especificaciones descargar pdf (Pagina 160)

158 Part Number STH038 5/12

SYMPTOM

Alert icon on the display is flashing and the alert

indicates a T1, T2, T3, or T4 Fault.

CHECK PROCEDURE

• Press the Menu button.

• Scroll down to Service and press right arrow.

• Scroll down to Diagnostics and press right arrow

• Scroll down to Temp Sensors and press right

arrow to display thermistor temperature readings.

NOTE: An open thermistor will display -30

°C and a

shorted thermistor displays 246

°C.

Thermistor Test

1. Disconnect thermistor from control board and

measure resistance.

2. Measure temperature at the thermistor.

3. Compare measured resistance/temperature

readings to resistance/temperature relationship

chart.

A. Within 10% of the published resistance value

- Thermistor is good

B. Not within 10% of the published resistance

value - Thermistor is defective.

Control Board Test

1. Disconnect thermistor from control board - The

display temperature reading, dropping to

-30

°C)indicates the control board is good.

2. Short thermistor pins - The display temperature

reading, climbing to 246

°C indicates the control

board is good.

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Manitowoc MII 302 Especificaciones Pagina 160