McQuay MWM Service Manual page 41

MCQUAY Service Guide Book Controller Configuration
Sequential LCD conversion for wiring up to 1000m
Work Indication (WI):
Step 1: Dismantle the BACK cover of Sequential LCD.
Step 2: Remove Jumper J1, J2.
Step 3: Add Chip Resistor 1/10W 5% 200K to R8, R9 and R10.
Step 4: Add PART 1000000030 IC: SMD MAX1438CSA to U4.
J2
R8, R9, R10
U4 J1
BACK View of Sequential LCD
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