Danfoss DGS - DGS Troubleshooting

© Danfoss | DCS (ADAP-KOOL®) | 2018.12
RI8SP202 | 8
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DGS - Troubleshooting
Symptom Possible Cause(s)
LED off • Check power supply. Check
wiring.
• DGS Modbus was possibly
damaged in transit. Check
by installing another DGS to
confirm the fault.
Green flashing The sensor calibration interval
has been exceeded or the
sensor has reached the end
of life.
Carry out calibration routine
or replace with a new factory
calibrated sensor.
Yellow • AO configured but not
connected (only 0-20 mA
output). Check wiring.
• Sensor type does not match
DGS specification. Check gas
type and measuring range.
• Sensor may be disconnected
from printed circuit board.
Check to see sensor is
properly connected.
• The sensor has been
damaged and needs to
be exchanged. Order
replacement sensor from
Danfoss.
• Supply voltage out of range.
Check power supply.
Yellow flashing • The DGS is set to service
mode from the hand held
service tool. Change setting
or await time out within 15
minutes.
Alarms in the absence of a leak • If you experience alarms in
the absence of a leak, try
setting an alarm delay.
• Perform a bump test to
ensure proper operation.
The zero-measurement drifts The DGS-SC sensor
technology is sensitive to the
environment (temperature,
moist, cleaning agents, gas'
from trucks, etc). All ppm
measurements below 75ppm
should be disregarded, i.e. no
zero-adjustment made.