User Guide | Danfoss troubleshooting guide for supermarket electronics
2 | BC337731384771en-000301
© Danfoss | Climate Solutions | 2022.02
Contents 1. AK-SM 800A ..........................................................................................................................................................................3
Compressors not coming on with high suction .............................................................................................................3
IO Offline ...................................................................................................................................................................................... 3
Case Controller ‘Mismatch’ Issue .......................................................................................................................................... 3
AK-SM 800A Stuck on ‘Verifying Nodes’ ............................................................................................................................3
2. AK-SM 800 .............................................................................................................................................................................4
Compressors not coming on with high suction .............................................................................................................4
Keypad not Responsive ...........................................................................................................................................................4
IO Offline ...................................................................................................................................................................................... 4
Database will not load via USB .............................................................................................................................................4
Case Controller ‘Mismatch’ Issue .......................................................................................................................................... 4
AK-SM 800 Stuck on ‘Verifying Nodes’ ...............................................................................................................................5
Missing License .......................................................................................................................................................................... 5
Host Comm/ Host Count Error .............................................................................................................................................. 5
Slowness in AK-SM 800 ........................................................................................................................................................... 5
DNS Failure Alarm .....................................................................................................................................................................5
3. AK-CC 550A ........................................................................................................................................................................... 6
AKV Not Opening ...................................................................................................................................................................... 6
Incorrect Superheat .................................................................................................................................................................. 6
Pe Error (E20) ............................................................................................................................................................................... 6
S3 Error (E25) ...............................................................................................................................................................................6
AK-CC 550A Case Controllers Offline .................................................................................................................................6
Mismatch Error during v2.0 Firmware Install ..................................................................................................................7
Configuration (AK-CC 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 override through program .................................................................................................. 7
Sensor Readings Fluctuating ................................................................................................................................................7
Intermittent IO Offline Issues ................................................................................................................................................ 7
6. Storeview ............................................................................................................................................................................... 8
Unable to Connect to Site that Works in Web Browser ...............................................................................................8
7. AK-SC 255 ...............................................................................................................................................................................8
Battery Replacement/Low Battery Alarm ......................................................................................................................... 8
255 Alarm Dialout Issues ........................................................................................................................................................8
‘Press 9 to Clear Database’ Message ................................................................................................................................... 8
‘Alarm’ Flashing on 255, LED Red but no active/acknowledged alarms ................................................................8
IO Offline ...................................................................................................................................................................................... 8
Missing License .......................................................................................................................................................................... 8
Black Display Screen .................................................................................................................................................................8
White Display Screen ...............................................................................................................................................................8
Host Comm/ Host Count Error .............................................................................................................................................. 9
8. AKC 55 .....................................................................................................................................................................................9
AKC 55 IO Relay Chattering ................................................................................................................................................... 9
AKC 55 Loses Program on Power Cycle .............................................................................................................................9
No Communication with AK2 Modules .............................................................................................................................9
9. AKC 164 ...................................................................................................................................................................................9
Sensor Failure Status ................................................................................................................................................................ 9
10. AKA 65 .................................................................................................................................................................................. 9
‘Invalid License’ ........................................................................................................................................................................... 9
‘Unable to locate compatible Win55’ Error ....................................................................................................................... 9
Unable to Fully Connect to Site Remotely .......................................................................................................................9
Unable to Direct Connect to AK-SC 255 Locally .............................................................................................................9
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