FAQ about INVT BPD Series Solar Pump Inverter

Some questions about INVT BPD series solar pump inverter

Q1: Keypad display AL-S, and system stop running?

A: AL-S is weak light alarm, means the current sunshine is not enough to drive the pump, result in the running frequency Hz is less than lower limit: (lower limit: P15.05*P00.03)

Conditions of AL-S:

a. Running frequency is less than P15.05*P00.35, and keep more than P15.20 time.

b. Current PV output voltage(P18.01) is less than undervoltage point.

(1HP: 60V, 2HP/3HP: 80V)

If current condition meets a or b, BPD will display AL-S alarm.

If P15.29=0, the system will switch to AC power input channel.

Q2：Single phase pump cannot start?

A. If removed the capacitors? Please remove the capacitors as the following photo, and make sure the resistor value U&V is the biggest OHM, U&W is the smallest value.

After the capacitors are removed, need to set P04.34=01. ( when set this value, Press SHIFT key can change the setting bit.)

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