SIM-Q MKII
Installation/operation instructions
DEIF A/S
Page 12 of 18
4 Operation
4.1
LED indicators
The SIM-Q MKII is equipped with three LED indicators: two green LEDs and one yellow LED
placed as the lowest one. The LED colours are as described in the table below:
Power
Top LED
OFF
MCU not yet initialised, or no power.
ON
Power on product and MCU has initialised.
Flashing
Power-up sequence.
Status
Middle LED
OFF
No valid measurement.
ON
Valid measurement.
Flashing
AAL mode: Measurement is not steady.
DIM mode: Last measurement failed.
Warning
Bottom LED
OFF
Measured insulation resistance is higher than set
point.
Long flash
(75 %, 500 mHz)
Measured insulation resistance is lower than set
point but relay is not active. (ON delay). (AAL
mode during power-up).
Short flash
(25 %, 500 mHz)
Measured insulation resistance is higher than set
point but relay is still active. (OFF delay).
ON
Measured insulation resistance is lower than set
point and relay is activated.
The next paragraphs explain more about LEDs in combination with the meter and switch
positions.
