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User Guide | Danfoss troubleshooting guide for supermarket electronics

© Danfoss | Climate Solutions | 2022.02

BC337731384771en-000301 | 5

3.  Common mistakes

a.  For AK-CC 550A, parameter o61 not set to match program.

i.  Typically o61=2 for most setups

4. Recommendations

a.  Use ‘Show only scanned devices’ option at top of Circuits screen to limit choices
b.  If correct choice is missing from list, update system manager to latest version of firmware

AK-SM 800 Stuck on ‘Verifying Nodes’

1.  Go to Network Nodes, verify only channels being used are enabled

a.  Disable any channels not being used
b.  Reset AK-SM 800

Missing License

1.  Did MAC address revert back to 00 : 0B : 2D : 00 : 4B : 00 ?

a.  If yes, AK-SM 800 must be replaced
b.  If no, please contact Danfoss Tech Support and supply the MAC address. Tech Support will help 

reinsert the license.

2.  The controller will still operate regularly, but you won’t be able to make any changes to 

configuration

a.  In need of immediate assistance, you may load in the back-up/old database to bring the license 

back.

Host Comm/ Host Count Error

1.  Verify the comm configuration (config 

 comm)

a.  Make sure same master IP addresses for every controller and separate slave IP addresses for 

each slave controller

b.  If DHCP is set to no, verify default gateway and network mask. Every controller will share the 

same default gateway and network mask

c.  Verify # of SM’s on network

2.  Verify rotary dial addresses

a.  Master unit needs have address 0
b.  Each controller must have unique address

3.  Verify connection from AK-SM 800 to switch, and switch to network

a.  Could be the issue with the cable
b.  Power cycle network switch, router, or cell modem

4.  Reset AK-SM 800

a.  Make sure to reset all slave controllers before resetting master

5.  Verify firmware version in each controller. Units should have same version.

Slowness in AK-SM 800

1.  Verify firmware version is above v8.074

a.  If running an older firmware version, it is recommended to upgrade (latest version is v8.091)

2.  Is slowness present when viewing case controller only or any other screen?

a.  If only present to case controller info, it could indicate an issue with case controller comm loop

i.  Try temporarily breaking loop to few case controllers and see if results are better. You may 

also choose to unplug Modbus plug and see if it speeds up

ii.  Start adding case controllers back to the loop one-by-one and see at what point slowness 

returns. This will indicate where the issue is.

DNS Failure Alarm

1.  DNS stands for domain name server, which allows you to type domain name (i.e. google.com) 

instead of server IP. If you know the server IP, you may choose to type in the IP and turn DNS off.

2.  DNS failure alarm indicates that an alarm transmitted, or attempted to transmit via email from the 

AK-SM 800, and there was no feedback from the email server to the AK-SM 800 saying the alarm 

was received.

a.  Sometimes the server is simply not setup to send this feedback, so if the user did in fact receive 

the initial alarm via email, it is nothing more than a nuisance and DNS alarm can be disabled.

b.  Otherwise, verify the DNS name entered under the Config 

 Alarms 

 Connections section of 

the SM800 is correct.

Содержание AK-SM 800A

Страница 1: ...User Guide Danfoss troubleshooting guide for supermarket electronics www danfoss com...

Страница 2: ...C 550A to AK SM 800 7 Dual Temp Setup 7 4 AK CC 750 7 Replacing AK CC 750 7 5 AK XM Modules 7 AKS Temp Sensor not Reading on IO Module 7 AK XM 103A module not coming online 7 Relay will not respond to...

Страница 3: ...should be 24 V AC DC 2 Verify Channel Lonworks enabled on Network Nodes screen a If not enable and rescan afterwards 3 Verify term resistor switch position at AK SM 800 is correct a If 1 loop from pl...

Страница 4: ...4 Replace AK SM 800 IO Offline 1 Verify Power to modules Complete rescan a Power supply to comm modules should be 24 V AC DC 2 Verify Channel Lonworks enabled on Network Nodes screen a If not enable...

Страница 5: ...ue address 3 Verify connection from AK SM 800 to switch and switch to network a Could be the issue with the cable b Power cycle network switch router or cell modem 4 Reset AK SM 800 a Make sure to res...

Страница 6: ...dc c Measure voltage across terminals 31 32 Should be in range of 0 5 4 5Vdc d Verify transducer type Label of transducer should say AKS32R HFC or AKS 2050 CO2 S3 Error E25 1 If no return air s3 senso...

Страница 7: ...e or loose connection between module and probe b If reading closed likely a short in cable between module and probe c If reading expected resistance compare to temp ohm chart for PT1000 move sensor to...

Страница 8: ...ion IO Offline 1 Verify Power to modules Complete rescan 2 Verify Channel Lonworks enabled on Network Nodes screen a If not update and rescan afterwards 3 Verify EOL resistor in place at end of loop a...

Страница 9: ...oftware reinstall AKA65 software outside of Program Files or Program Files x86 folder 3 Obtain generic copy of aka65 ini file place in C Windows folder replace existing Unable to locate compatible Win...

Страница 10: ...Danfoss Climate Solutions 2022 02 BC337731384771en 000301 10...

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