25
Operating instructions for EE360 Moisture in Oil
6 Maintenance
6.1 Self diagnosis and error messages
6.1.1 Error messages via display
Error description
Error code (display) Error category Recommended action
Voltage out short circuit - output 1 only*
1.1
1
Check wiring of outputs
Voltage out short circuit - output 2 only*
1.2
Voltage out short circuit - both outputs*
1.3
Current loop open - output 1 only
2.1
Check wiring of outputs
Current loop open - output 2 only
2.2
Current loop open - both outputs
2.3
Humidity sensor dirty
3.x
Clean the sensor
(see 6.3 Cleaning the sensing
head / filter replacement)
Hardware error
5.x
2
Return the faulty unit to
E+E for service
6.x
8.x
Temperature measurement failure
7.x
Humidity measurement failure
9.x
10.x
* not available with 0 - 1 V output
Tab. 2
Overview of error codes
Error category 1
= non-critical error, can be solved by the user
•.
The display blinks and the buzzer beeps every 10 seconds.
•.
T
he.red.status.LED.flashes.
Error category 2
= critical error, return the device to E+E for service
•.
The display blinks and the buzzer beeps continuously.
•.
The red status LED lights continuously.
6.1.2 Error messages via LEDs
Four status LEDs placed on both sides of a PCB are located close to the USB service interface, under a
blind cover.
PCB
LED 1
LED 2
LED 4
LED 3
Current output
Error LED
error LED on = error category 1
error LED flashes = error category 2
Voltage output
power supply/
main board
Fig. 25
Status LEDs
LED 1 (blue):
analogue output is set to voltage.
LED 2 (orange):
analogue output is set to current.
LED 3 (flashing green):
supply voltage applied (microprocessor is active).
LED 4 (red):
constant lit: error category 1
flashes:.error.category.2
