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E1/EL01 – Comms Error
If all is ok with field cabling and wiring
Use your multimeter to measure the dc voltage between terminals S
•
& N (black tester S / red tester N)
Voltage should flucate between + and - values
•
If the voltage is fixed it is the indoor board at fault
•
If the voltage fluctuates but only with positive values it is the outdoor
•
board at fault
Check spade connections onto boards. If all is good, condemn the
•
applicable PCB
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