If you store your Poseidon Smart Module for an extended period of time, it will self-discharge until it is completely dead. In this circumstance the Poseidon proprietary multi-function desk-top intelligent charger will not recognize the module when it is inserted in the charger and will not begin charging. Ironically, the total absence of any charge in the Smart Module makes it impossible to charge. The solution is to force just enough charge in to allow the desk-top charger to detect the module and begin a charging cycle.
To bring your Smart Module back to life, there are some things you will need: The dead Smart Module and it's desk-top charger, a Se7en (an MK VI won't work) with a CANbus cable and M28 dive computer. I've used other methods in the past, but I prefer the method described. Keep in mind this is not a last minute "quick fix" to a depleted charge. Although the steps required to begin accepting a charge take only a few minutes, it will require several hours to re-charge and then perform a learn cycle.
- Charge the M28 until full and also power up the Poseidon multi-function desk-top charger.
- Connect a CANbus cable directly between the M28 and Se7en.
- Now insert the completely discharged Smart Module in the Se7en .
- Power up the M28 and using the M28 menu navigate to "Dive mode" and select (CC) SE7EN. Using the M28 menu navigate to "Settings >: Connect >: PowerOut" and select "ON", then exit the menu. Make sure the date/time/zone are set correctly in the M28 and if not adjust the values accordingly.
- Using the M28 menu navigate to and select "Start SE7EN". The Se7en may not actually power up and start, but if the Set SE7EN RTC menu item then appears, navigate to and select the Set SE7EN RTC item which should also set the RTC in the battery.
- Wait a minute, then remove the Smart Module from the Se7en E-module and immediately place it in the desk-top charger. Within a few seconds the Charge Status LED should begin blinking green, indicating charging.
- While charging, disconnect the M28 from the Se7en and shutdown the M28.
- Once the desk-top charger indicates Smart Module is fully charged, reconnect the CANbus cable directly between the M28 and Se7en. Power up the M28 and using the M28 menu navigate to "Dive mode" and select (CC) SE7EN. Do this while the Smart Module is removed from the Se7en.
- Power up the Se7en by inserting the Smart Module. The M28 should begin displaying the Se7en POST.
- A completely depleted Smart Module will probably have erased its firmware, if so you will see an error 09 during POST and/or the M28 may indicate a network communications error. Regardless, use the M28 menu navigate to Apps > System > Force fw update and select Force fw for the BAT item.
- Once the firmware has been updated, the Se7en POST will time out and shutdown. Remove the Smart Module, reinsert again and once the Se7en begins it's POST, then verify the Se7en firmware has been updated by using the M28 menu to navigate to Apps >: System and in the system information find "Connected Units" item BAT with value of current firmware version.
- Set the the Se7en RTC again, shut the Se7en down, remove the Smart Module and perform a learn cycle on the module with the charger. Once complete your dead Smart Module has been resurrected, but keep in mind that allowing the battery to completely deplete may have shortened it's service life.
From the Poseidon Se7en User Manual: "The best storage method, if the battery will not be used for a substantial period of time, would be to top off the charge once a month by running it on the normal charge cycle in the desk-top charger. If this is not possible, then the best long term solution is to the leave the battery on the charger with power to the charger turned on. The method of monthly top-off of charge, however, will maximize the battery life."
