Rational iCombi Pro Troubleshooting Manual page 43

2
Change the temperature sensor PT1000
(see MI_2086)
RESET eSTL
end
Servicefehler: 72
Disconnect the sensor from the wire harness
Disconnect the sensor (PT1000) and meassure the resistance of both sensors (red-red + white-white).
Note: Every temperature sensor PT1000 (steam or hot air) has two resistances inside.
yes
or has one of them a resistance value
Check the connection (red, blue, black cable) between the I/O pcb and the eSTL (Test it by trying to pull each cable as well)
4
Switch ON the unit
Problem solved? yes
no
Switch OFF the unit
Are the resistances
of both sensors different
(delta >117Ohm ≙ 30°C = 90°F)
less then 1000 Ohm?
5
4
end
Connect the temperature sensor PT1000 to the wire
no
harness once again