McQuay MWM Service Manual Book page 45

Ducted Blower B/C/D/ER Series Model – Single Compressor
Rooftop Packaged Air Conditioner – Single Compressor
Model
SB 75 – 100B/BR
SB 75 – 100D
SB 75 – 100ER
SB 125 – 150B/BR
SB 125CR
SB 125 – 150D
SB 125 – 150ER
RT 55 – 120A/AR
Seven Segment Display – SLM3
Seven Segments
E1 blinking
E2 blinking
E3 blinking
E4 blinking
E5 blinking
Board
L208A
L208A
L208A
U1SB125
U1SB125
U1SB125
U1SB125
U1SB125
Faulty Indication
Room air sensor contact loose / short
Indoor coil sensor contact open
Outdoor coil sensor contact open
Compressor overload protection /
Indoor coil sensor short /
Outdoor coil sensor short
Gas leak
Handset
SLM3
SLM3
SLM3
SLM3
SLM3
SLM3
SLM3
SLM3
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