abbreviations and acronyms iv
AC circuit breaker requirements 2–13
AC grounding requirements 2–8
AC output voltage ratings A–2
AC utility voltage 4–2
AC wiring instructions 3–7
acceptable wire s izes A–5
accessing AC and DC ter mi n al s 3 –2
accessories 1–7, A–6
adjustable disconnect settings A–3
checking AC utility voltage 4–2
checking PV array DC voltage 4–2
circuit breakers and fuses 2–13
communication between multiple inverters 3–12
communications cabling 3–14
installing for inverters in parallel 3–16
standard CAT 5 wiring 3 –14
conduit holes 2–12
conduit nipples
installing 2–23
Customer Service
preparing to call WA–4
DC wiring instructions 3–4
derating chart A–3
dimensions 2–16, A–5
display accuracy A–5
efficiency chart A–4
electrical specifica tions A–2
enclosure type A–5
error messages and solutions 6–8
fan kit 1–7, 2–23, A–6
fault conditions and solutions 6–8
FCC information to the user viii
features and options 1–3
front panel display 1–3, 5–2
fault messages 5–6
normal operation messages 5–3
offline mode messages 5–5
reading messages 5–3
special messages 5–8
startup messages 5–3
fuse, location of ground fault protection 6–5
fuses and circuit breakers 2–13
general maintenance 6–3
ground clearance required for installation 2–4, 2–18
ground fault protection fuse 2–14
replacing 6–4
grounding requirements 2–8
guidelines for matching PV array size to inverter input
2–7
heat sink cover 1–7, 2–26
humidity limits A–5
information about your system form WA–4
installation
fan assembly 2–23
grounding requirements 2–8
location concerns 2–4
mounting 2–19
options 2–2
overview 2–15
planning issues 2–2
preparing for 2–13
PV array requirements 2–5
routing wires 2–11
inverter
features and options 1–3
installation 2–15
model number WA–4
models 1–8
purchase date WA–4
purpose 1–2
removing from wiring box 6–6
Index