Test The Function Of The Relay - Xylem FLYGT MiniCAS II Installation, Operation And Maintenance Manual

6 Troubleshooting

6.3 Test the function of the relay

1. Simulate a normal condition.
a) Connect a 1 kilohm resistor in series with an ammeter to the sensor output.
b) Connect terminal 6 and 7 to reset the relay.
2. Simulate the temperature alarm.
a) Disconnect the resistor.
b) Reconnect the resistor.
c) Connect terminal 6 and 7 for a short while to reset the relay.
3. Simulate the leakage alarm.
a) Connect a lead between terminal 5 and 7.
b) Keep the short circuit closed for 10 s.
c) Remove the lead between terminal 5 and 7.
12
~(+)
6
1 k
7
+
12 VDC
A
5
–
1
11
Only the supply LED lights up and the meter shows 12 mA if the condition is
normal.
The temperature LED is lit.
The temperature LED is still lit.
The temperature LED is turned off.
~(+)
6
7
+
12 VDC
5
–
1
11
10 s
This short circuit does not damage the unit.
The leakage LED is lit.
The leakage LED is turned of.
~(–)
3
4
9
8
10 s
~(–)
3
4
9
8
MiniCAS II Installation, Operation, and Maintenance Manual