Danfoss AK-SM 800 IO Service guide

AK-SM 800 IO Offline Troubleshooting

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Department (slide master)

Online Check

1. From Network Nodes screen go to ‘Config Status’ tab

2. Each line item indicates a single module/controller

3. Verify all programmed modules are online

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Department (slide master)

IO Communication Issues

Initial Checks

 Power  Does module exist?  Comm module rotary switch  Proper comm module type?

AK-SM 800 Checks

 Proper channel enabled?

Wiring Issues

 Does polarity matter?  EOL resistors  Daisy-chaining and 800 termination  Type of wire used

Problem Correction

 Rescan

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Department (slide master)

Power

1. 24Vac/dc required for comm module*

2. Solid green indicator at top if power ok

3. Individual Power LED on each module as well

4. Comm module requires connection to 2

*Will power at lower voltages (i.e. 12V), but will not bring connected modules online

module to power

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Department (slide master)

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