GESTRA NRG 211-1, Оригинальная инструкция по установке

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Troubleshooting
HIGH level exceeded, equipment does not work
Display Error Remedy
Only LED
Power ON
illuminated
Level electrode not submerged.
Measure the voltage of the NRS 2-4 across C18/A18.
Check installation and measure the voltage of the
NRG 211-1 across terminals 2 and 3. Check installa-
tion of level electrode and, if necessary, change it.
Level switch defective.
Measure the voltage of the NRS 2-4 across C16/A18
(supply voltage of level electrode). If no voltage can
be measured replace the level switch.
Electronic module defective.
Measure the voltage of the NRS 2-4 across C18/A18.
Measure the supply voltage of the NRG 211-1 across
terminals 1and 3 and the measuring voltage across
terminals 2 and 3. Replace electronic module if
supply voltage is 12 V DC but no measuring voltage
can be measured.
Temperature sensor defective.
Measure the measuring voltage of the NRG 211-1
across terminals 2 and 3. If you measure a volt-
age of 1 - 4V check the temperature sensor. If the
temperature sensor is defective replace the level
electrode.
Indication, diagnosis and remedy
Checking temperature sensor
1. Turn up the retaining bracket
e
and detach the upper part of the connector
i
from the level
electrode.
Fig. 4
2. Unscrew the four cover screws and detach cover from terminal box.
3. Detach the connecting lines of the temperature sensor
p
and connect an ohmmeter
q
. Fig. 5
4. Measure the resistance value and compare the result with the water temperature in table 1.
If necessary, interpolate intermediate values.
5. If the values deviate replace the level electrode with a new one.
6. If the resistance value corresponds to the temperature, re-attach the connecting line to the
temperature sensor
p
.
7. Fit the cover of the terminal box in place and tighten the four cover screws.
8. Plug the upper part of the connector
i
into the lower part
f
and secure it in place by turning
down the retaining bracket
e
.
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