Instruction Manual

Troubleshooting
5–4 975-0400-01-01 Revision H
This manual is for use by qualified personnel only.
The ground fault protection fuse blows when severe leakage occurs between the
PV array and earth ground, or when the system has been installed with faulty
wiring. Before replacing the fuse, it is important to have qualified service
personnel, such as a certified electrician or technician, determine the cause of
the ground fault.
To replace the ground fault protection fuse:
1. Remove the wiring compartment cover, as described on page 2–5.
The ground fault protection fuse is located behind the wiring terminals.
2. Remove the blown fuse and replace it with a new AC/DC midget cartridge,
rated 600 Vdc, 1A (Littelfuse KLKD 1 or equivalent). Be careful not to
damage the fuse clips, circuit board and surrounding components.
3. Replace the wiring compartment cover.
WARNING
ELECTRICAL SHOCK HAZARD
Dangerous voltages can exist inside the solar charge controller. If there is
leakage current from the ungrounded conductor to ground at the array,
touching the grounded lead could cause a life-threatening shock.
Cover PV arrays with an opaque material during this procedure.
When the fuse has blown due to a fault, incorrect handling can be life-
threatening. Use insulated tools.
Failure to follow these instructions can cause death or serious injury.