Zener ECODRIVE 8000 Installation Manual Supplement page 26

ZENER VARIDRIVE SOLUTIONS
Solar Only – No Irradiance Sensor
The ECODRIVE monitors the DC voltage. If the voltage from the solar array reduces below the entered "VOLTAGE AT MAXIMUM
POWER" the ECODRIVE MPPT tracking adjusts its output accordingly. If the speed decreases less than the 'C01 MINIMUM SPEED'
for the 'LO SOLAR QUALIFICATION TIME' period, low solar state is activated, and the pump is stopped.
When sufficient Solar Energy is available and the DC voltage rises to the "RESTART DC VOLTS" for the "RESTART DELAY" the Pump
will restart.
Solar & Auxiliary AC Power Management
When an auxiliary AC power supplied is used an irradiance sensor is required.
587V 675W/m^2
0.9kW SOLAR
550V 501W/m^2
0.9kW TRACKING
530V 480W/m^2
0.9kW AC Pwr
530V 480W/m^2
0.9kW Lo solar
604V 480W/m^2
0.9kW AC Pwr
604V 480W/m^2
0.9kW SFC
When a 'LO SOLAR' condition is met but the Auxiliary AC power supply is not present, a 'PF' Alarm is displayed. If
sufficient solar is or becomes available the ECODRIVE will restart on Solar Power.
IM00130
If the measured irradiance is greater than the "SOLAR GOOD THRESHOLD" for the
"RESTART DELAY TIME" then the AC power supply contactor is opened and the power
O
for pumping is sourced only from the solar array
N
The ECODRIVE monitors the operating conditions for signs of insufficient solar energy
conversion. The ECODRIVE will 'track' these conditions and adjust its output to the
solar power available
If the measured irradiance is less than the "LOW SOLAR THRESHOLD" for the "LOW
SOLAR QUALIFICATION TIME" then the AC power supply contactor is closed and the
power for pumping is sourced from both the AC power source and the PV array
Should there be a conflict between the irradiance sensor feedback and the DC voltage,
the ECODRIVE will continue to operate from the AC power supply source. For example:
measured irradiance is high but the DC volts are low due to solar array isolator left
.
open
If the irradiance sensor feedback is faulty then the ECODRIVE will continue to operate
from the AC power supply source.
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