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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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