Hawke’s Bay
Manual
31| P a g e 1 0 - 4 2 5 - 1 R E V : - F W : X X X
TROUBLESHOOTING
No Power Out - Resting
Resting means the
Hawke’s Bay
is not in Bulk, Absorb, Float, or Equalization charging modes. If
the PV input is absent or the PV voltage is too low, the
Hawke’s Bay
will remain in Resting.
Check that the Mode is ON. If the Mode is OFF, the MNGP2
will display “Mode is OFF” vice
“RESTING,” but the Hawke’s Bay
will act like it is Resting. Is it overcast outside? PV panels need
sunlight intensity (photons) to create PV current. No current = Resting.
PV Input Issue
If the PV input voltage drops too low or is absent, the problem may be in the PV source circuit;
that is, the wiring, disconnects, and circuit breaker(s) on the PV side of the charge controller.
Low or no PV Voltage:
•
Defective PV module:
▪
Bad internal solder joint between cells.
▪
Defective internal bypass diodes.
▪
Defective module PV connectors.
•
Defective installation of PV connectors:
▪
Poor crimping of the terminal.
▪
PV connector not plugged in all the way.
•
A wire shorting out intermittently:
▪
Pinched wire might be shorting out when the PV frame expands and contracts.
▪
A wire that has been moving with the wind and rubbed through the insulation.
•
PV input circuit breaker:
▪
Loose wire connection into the PV input circuit breaker.
▪
Using a circuit breaker NOT rated for DC current.
▪
Defective components inside the circuit breaker.
▪
Loose crimp/screw/lug of the wire connected to the circuit breaker.
Daylight creates PV voltage; sunlight intensity creates PV current.
PV voltage x PV current = PV wattage.
A poor connection in the PV source circuit may generate a high resistance, which leads to
heat build-
up, which reduces or “drops” the voltage, which increases the current flow. All of
this is bad! Check your connections.
Connecting or
disconnecting PV
connectors (MC4) while
the module is in the sun
MAY damage the
connector contacts.
