Smartrise F220

228
F33
Rdn IC Stop
Causes
This fault is related to safety critical inputs that come in on two input terminals. A fault occurs
when one input is on and the other is off.
Mismatch on CT input pair
Remedies
Check for wiring mistakes on the inputs terminals.
Check for plug-in terminal blocks on SRU board that might be defective.
Verify input LEDs go on and off together. If LEDs do go on and off together, check SRU board
for metal shavings or anything that might be grounding or shorting the components on the
board.
Replace SRU board.
F35
Rdn UET
Causes
This fault is related to safety critical inputs that come in on two input terminals. A fault occurs
when one input is on and the other is off.
Mismatch on MR input pair
Remedies
Check for wiring mistakes on the inputs terminals.
Check for plug-in terminal blocks on SRU board that might be defective.
Verify input LEDs go on and off together. If LEDs do go on and off together, check SRU board
for metal shavings or anything that might be grounding or shorting the components on the
board.
Replace SRU board.
F36
Rdn DET
Causes
This fault is related to safety critical inputs that come in on two input terminals. A fault occurs
when one input is on and the other is off.
Mismatch on MR input pair
Remedies
Check for wiring mistakes on the inputs terminals.
Check for plug-in terminal blocks on SRU board that might be defective.
Verify input LEDs go on and off together. If LEDs do go on and off together, check SRU board
for metal shavings or anything that might be grounding or shorting the components on the
board.
Replace SRU board.