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TROUBLE SHOOTING CONTINUED... AND DIAGNOSTIC PROCEDURE
CAN Bus Signal Lost: The current indication suggests that the system may have lost its connection, as it requires a functioning CanBus system to operate even when not connected to a CAN Bus battery. • We recommend checking the CAN-H and CAN-L cables and performing a power cycle to resolve this issue. HS Battery is in Float Mode: • Based on current readings, it appears that the high-side battery float charge mode. To modify this setting, please access the designated 'setting page.' • However, we strongly advise referring to the battery manufac- turer's specifications before making any changes. Idle Setting Off: The current configuration appears to be in the Prevent charging mode because Scotty AI is turned off. • To modify this parameter, please access the main page and adjust the 'Idle' settings accordingly. The Car Engine is Off: The system thinks the car engine is off, so there is no charge. • Please note that the system has a less-than-minute delay in changing states. HS Battery Preventing Discharge: High Battery-preventing discharge means that the house battery BMS is not accepting a discharge, which may suggest that the Battery is already fully discharged. • However, it is also possible that there may be underlying issues with the Battery's health. • Therefore, we recommend thoroughly checking the house battery's condition to ensure optimal functionality. The Car Engine is On: The system thinks the car engine is on, which means no discharge. • Please note that the system has a less-than-minute delay in changing states. HS Min Discharge Voltage is reached: Based on current readings, the high-side battery voltage appears to have reached the minimum allowable discharge voltage. • To modify this setting, please access the designated 'setting page.' • However, we strongly advise referring to the battery manufac- turer's specifications before making any changes. LS (Low Side) Load is Low: Based on the current readings, there is an insufficient load connected. • We recommend checking the camping voltage and LS voltage to ensure the system's proper functioning. SCOTTY DIAGNOSTIC PROCEDURE IN CASE OF
If all the above is correct, do the following: • Run the engine at cruising speed. • Watch the data on the Status Page. • Note the LS alternator Voltage sense. If it is above 12.8 V, then the alternator is producing power to match the load. Take a screenshot of this status page to keep a record of the LS alternator Voltage sense. • Go to the Starter battery. • Measure the voltage on the starter battery accurately. • Compare this to the Voltage on the screenshot. The voltage difference x the current in A is the cable loss. So 13.2 V at the battery, and 12.8 V on the Scotty AI Status Page, means 0.4 V at, so say 100 A = 40 W. It is far too high, and you check the Negative path at first for a good connection. A good loss is 10-15 W. • Look at the Scotty Status page screenshot. If the number it shows is less than the above calculation, then the problem is the negative connection. • The negative wire from the Starter battery to the chassis in the engine bay must be bolted to an paint-free and clean metal surface. • The negative wire from the Target Auxiliary battery to the chassis must be bolted to an paint-free and clean metal surface on the chassis. • We do not recommend laying a separate negative wire, unless there is no chassis for example on a boat. The negative wire is generally the problem in 95% of all circumstances. If the negative connection is resolved and you still have insufficient power, it is one of these things: 1. The starter battery MUST be AGM or Lead/Acid. If it is Lithium, remove it and return it to the factory standard. 2. The alternator can not deliver enough power. 3. Engine or vehicle loads on a 12 V alternator are high. (Nissan Patrol has electric power steering and takes a lot of power, leaving little powerfor Scotty AI. Scotty AI takes power AFTER the vehicle loads, so they are not compromised. 4. Cable sizes are too small (both positive and or negative). 5. Target Battery(s) can not accept charging at a higher rate, either because they are high SOC or, the temperature has limited BMS, or the Lithium battery just has a lower charging rate (less expensive Lithium batteries.) 6. If charging a caravan from a vehicle with Scotty AI in it and a 7-10 m run at 48 V from Scotty AI to Lithium in the Van, then especially when solar is running, the voltage differential will not be as high and an expected charge rate is 1000 W at caravan 49-50 V and 2000 W when the expected caravan charge rate is 47-48 V. 7. Note that Scotty AI does not use the State of Charge in any calculation.We only use voltage for control. 8. State of Charge is a ‘Calculated concept’ and does not exist in any measured form. It is a calculation that may be reasonable after the batteries are 100% for 2 hours or so. If batteries operate in the 20-85% band repeatedly over a 1-2 week period, they will likely be around 50% max of their capacity, because the cells have not balanced. Safiery’s 48 V batteries actively balance between 90-95% SOC calc value.They are only fully charged when the calculation shows 100% SOC.
INSUFFICIENT POWER At first do the Auto-Tune: • Check the Tuning Page.
- Ensure that the Alternator Size is Correct? - Ensure that max Alternator Current is Correct? • Check the Status Page. • Ensure that Scotty AI is set to ’Hard’?
NEVER DISCONNECT THE NEGATIVE - NEVER
Sa ery Pty Ltd. • ABN: 87 624 588 807 • 45/8 Distribution Court - Arundel - QLD 4214 - Australia (07) 210 22 55 3 • www.sa ery.com • sales@sa ery.com
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