PROBLEM: NO COOL IN CONFERENCE ROOM DIAGNOSIS: THERMOSTAT WAS CALLING FORCOOLING WHEN INSPECTED. AFTER MOVING TO THE ROOFTOP UNIIIT AND INSSSPECTING THE UNIT, IT WAS FOUND THAT THE INDOOR BLOWER MOTOR FAN BELT WAS BROKEN. REPAIR: WEATHER MASTERS REPLACED THE 4L-410 BELT. CYCLED POWER TO THE SYSTEM THAT RESET THE PRESSURE SWITCHES. VERIFIED SEQUENCE OF OPERATIONS FROM THERMOSTAT