4
110522-3
Problem Possible Cause Remedy
Failure to start or no air delivery
Inadequate air delivery with cooler
running
Inadequate cooling
Motor cycles on and off
Noisy
Excessive humidity in house
Musty or unpleasant odor
Water draining from cooler
1. No electrical power to unit
• Fuse blown
• Circuit breaker tripped
• Electric cord unplugged or damaged
2. Belt too loose or tight
3. Motor overheated
• Belt too tight
• Blower bearings dry
4. Motor locked
1. Insuffi cient air exhaust
2. Belt too loose
3. Pads plugged
1. Inadequate exhaust in house
2. Pads not wet
• Pads plugged
• Open spots in pads
• Trough holes clogged
• Pump not working properly
1. Low voltage
2. Excessive belt tension
3. Blower shaft tight or locked
4. Bearings dry
1. Bearings dry
2. Wheel rubbing blower housing
3. Loose parts
1. Inadequate exhaust
1. Stale or stagnate water in cooler
2. Pads mildewed or clogged
3. Pads not wetting properly
• Trough holes clogged
• Pump not working properly
1. Float arm not adjusted properly
2. Drain assembly leaking
1. Check power
• Replace fuse
• Reset breaker
• Plug in cords or replace if damaged
2. Adjust belt tension
3. Determine cause of overheating
• Adjust belt tension
• Oil blower bearings
4. Replace motor
1. Open windows or doors to increase air fl ow
2. Adjust belt tension or replace if needed
3. Replace pads
1. Open windows or doors to increase air fl ow
2. Check water distribution system
• Replace pads
• Repack pads
• Clean trough and unplug holes
• Replace or clean pump
1. Check voltage
2. Adjust belt tension
3. Oil or replace bearings
4. Oil bearings
1. Oil bearings
2. Inspect and realign
3. Tighten loose parts
1. Open doors or windows
1. Drain pan and clean pads
2. Replace pads
3. Check water distribution system
• Clean
• Replace or clean pump
1. Adjust fl oat
2. Tighten nut and drain cap.
Troubleshooting
Model
Modelo
Volts
Voltios
Amperage
Ameraje
Speed
Velocidad
Water Capacity (gal)
Capacidad de Agua (galón)
Weight (lbs.)
Peso (libras)
Dry
Seco
Operating
Lleno
MMBT12 115 8.1 2 8 96 162
MMBT14 115 10.7 2 11 150 242
Specifi cations / Especifi caciones
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