ASHAPOWER NOVA-40 Руководство пользователя - Страница 7
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TROUBLE SHOOTING
ERROR
DESCRIPTION
CODE
PV PANEL VOLTAGE
EV
ERROR
BATTERY BANK VOLTAGE
EB
ERROR
ET
HIGH TEMPERATURE
HARDWARE
FAILURE
EM
HARDWARE ERROR
IMPORTANT NOTE FOR ACTIVATION OF INITIAL LIMITED
AMPERE BATTERY CHARGING AND EQUALIZATION CHARGING
1. What is initial limited ampere battery charging in MPPT charge controller ?
Maximum recommended charging current for a solar C10 lead acid battery is up to 20% of its Ah.
Batteries used in solar power system is often discharged below 11.5V every day. So it is recommended to start
initial charging with limited ampere instead of charging with maximum capacity of the charge controller.
Recommended maximum charging current for a 12V,150Ah lead acid solar battery is 30 Amp. If such a
Eg:
battery is connected to MPPT charger delivering above 30 amps, the excess ampere entering the battery
can be controlled in the initial charging stage by
On activating this feature charger delivers only 20% of the connected battery Ah. ie.30 amps to the battery.
Three options are given to control the initial charging limit. In default the charge controller is
is set in option "0" without any ampere limiting in charging.
Option 1. Ampere Limiting based on grid to solar load shifting voltage:
In this mode battery charging ampere is limited in the initial stage up to the given limit of grid to solar load
shifting voltage. (eg.If grid to solar load shifting voltage is set to 14.2v charge controller limits the charging
current up to 20% of the Ah of the connected battery up to this volt limit.There after the entire current
is shared between the connected inverter load and battery charging).
Option 2. Ampere limiting based on Charging mode :
In this mode also, battery charging ampere is limited in the initial charging stage and the limitation is stopped
when float charging starts (completion of bulk charging stage). There after the entire current is shared
between the connected inverter load and battery charging.
Option 3. Ampere limiting irrespective of charging mode.
If the battery is still in float charging mode in the morning, the charge controller will not limit the charging
current and the entire ampere will enter the battery.So it is recommended to set the option 3 to start with initial
limited amp charging everyday morning.
MPPT charge controllers are sun light dependent devices and they can't deliver high ampere in the morning.
They start to charge the batteries in low ampere early in the morning. As the terminal volt of the battery
increases, charge controller shifts the connected inverter load to solar power mode and the current is shared
between connected load and battery charging.Hence the activation of limited ampere charging is not
necessary in low ampere charge controllers connected with high Ah batteries.
eg: If the charge controller delivers more than 30amp current in starting stage and the connected battery is
below 150Ah it is recommended to activate limited ampere charging option.
2. What is Equalization charging in MPPT charge controller
When a lead acid battery is left in a discharged state for extended periods of time, non-removable sulphate
crystals are formed on the surface of battery plates that reduce the charging and discharging capacity of the
battery. Equalization charging is an over charging process of lead-acid batteries above their recommended
PV PANEL VOLTAGE IS NOT IN THE SPECIFIED LIMIT. CHECK FOR PV PANEL GROUPING.
REFER PV PANEL GROUPING MANUAL PROVIDED.
CONNECTED BATTERY BANK VOLTAGE IS NOT IN THE SPECIFIED LIMIT. CHECK FOR
DEFECTIVE BATTERIES LOOSE CONNECTION OF JUMPER WIRES AND NUMBER OF
BATTERIES.
CONNECTED PV PANEL CAPACITY (WATTS) IS NOT IN THE SPECIFIED LIMIT OR CHECK
FOR THE FUNCTION OF THE COOLING FAN.
LIGHTNING MAY CAUSE HARDWARE FAILURE. IF CONTINUOUS BEEP SOUND AND
ERROR MESSAGE EM IS SEEN, CHECK FOR LOOSE CONTACT OF BATTERY
CONNECTORS OR FAULTY BATTERIES.DISCONNECT AND RECONNECT THE BATTERY
WIRES FROM THE DEVICE. IF THE PROBLEM PERSISTS CONTACT THE INSTALLER FOR
SERVICE ASSISTANCE.
EARTH LEAKAGE FROM THE MOUNTED WALL MAY CAUSE HARD WARE ERROR
MESSAGE.UN-MOUNT THE DEVICE AND ISOLATE IT FROM THE WALL BY MOUNTING
ON A WOODEN OR PVC BOARD.
activating initial limited ampere battery charging feature.
7
SOLUTION
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