Maintenance; Troubleshooting; Temperature Compensation - Victron energy Skylla-i 24/80 (1+1) Manual

4.3. Four stage charge curve for Lithium Iron Phosphate (LiFePo4) batteries
4.3.1. Bulk
Entered when the charger is started (DS-2 on and battery voltage <26V, or DS-2 off), or when the battery voltage falls below
26,7V (due to a heavy load) during at least 1 minute. Constant current is applied until absorption voltage is reached (28,4V for a
24V battery).
4.3.2. Absorption
After the absorption voltage has been reached, the charger operates in constant voltage mode.
The recommended absorption time is 2 hours.
4.3.3. Storage
After absorption charge the output voltage is reduced to storage level. This level is not sufficient to compensate for slow self-
discharge of the battery, but will maximize service life.
4.3.4. Weekly battery 'refresh'
Once a week the charger will enter Repeated Absorption-mode during one hour to 'refresh' (i. e. to fully charge) the battery.

5. MAINTENANCE

This charger does not require any specific maintenance. However an annual check of the battery connections is recommended.
Keep the charger dry, clean and free of dust.

6. TROUBLESHOOTING

Problem
Charger does not function
The battery is not fully charged
The battery is being overcharged
Battery temperature too high
Failure led on
(see also chapter 9)

7. TEMPERATURE COMPENSATION

Absorption
Float
14
Possible cause
The mains is not ok
Input or output fuses are defective
A bad battery connection
The battery select switch is in the wrong
position
Cable losses too high
The battery select switch setting is
switch is in the wrong position
A battery cell is defective
Overcharging or fast charging
Battery voltage too high (> 36 V)
Bulk time too long (> 10 hrs)
Temperature in cabinet too high
10 ° C 25 ° C
Battery
temperature
Solution
Measure mains: 180 -265 VAC
Return product to your dealer
Check battery connection
Select correct battery type with
rotary switch
Use cables with larger cross
section
Use external voltage sensing
Select correct battery type with
rotary switch
Replace battery
Connect external temperature
sensor
Check all charging equipment
Check cables and connections
Possible cell failure, or
higher charge current needed
Check air vents of cabinet
Improve cooling of environment
Figure 7
50 ° C