Neptune R450 MC, Installation And Maintenance Manual

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Troubleshooting
R450 Mini Collector Installation and Maintenance Guide 41
Verifying Main Power
Usually, it is a good practice to check the main power and make sure it
is within specification. If there are no power indications on the R450
MC, this must be checked.
• Disconnect the power plug to the R450 MC. See Figure 62.
Figure 62 AC Power Plug Disconnected
• Using a voltmeter, verify that there is 12V AC between pins A and
B on the power plug.
• If voltage is not present on the power plug or is less than 11V AC,
there is something wrong with transformer or circuit breaker.
When checking power for a DC-powered R450 MC, such as solar or
UPS, verify that +12V DC is between Pins C (+) and D (-).
Verifying Radio Module Power
Neptune recommends checking the voltage levels going to the radio
module.
1 First, use the wrist strap. Put it on your wrist and attach the alligator
clip to the cabinet.
2 Disconnect the power plug from the R450 MC.
3 Remove the 6-pin connector located in the lower right corner of the
radio module. There is a locking tab on the bottom side of the
connector.
The R450 MC uses two different versions of the power cable depending on
the power source:
• AC Power Cable (for transformer), Neptune P/N: 13064-000
• DC Power Cable (for solar or UPS), Neptune P/N: 13065-000