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110522-1
Problem Possible Cause Remedy
Failure to
start or no air
delivery
Inadequate
air delivery
with cooler
running
Inadequate
cooling
1. No electrical power to
unit
• Fuse blown
• Circuit breaker
tripped
• Electric cord un-
plugged 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. 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 distribu-
tion system
• Replace pads
• Repack pads
• Clean trough and
unplug holes
• Replace or clean
pump
Troubleshooting
Motor cycles
on and off
Noisy
Excessive
humidity in
house
Musty or
unpleasant
odor
Water drain-
ing from
cooler
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 leak-
ing
1. Check voltage
2. Adjust belt tension
3. Oil or replace bear-
ings
4. Oil bearings
1. Oil bearings
2. Inspect and realign
3. Tighten loose parts
1. Open doors or win-
dows
1. Drain pan and clean
pads
2. Replace pads
3. Check water distribu-
tion system
• Clean
• Replace or clean
pump
1. Adjust fl oat
2. Tighten nut and drain
cap.
Problem Possible Cause Remedy
Model
Modelo
Volts
Voltios
Amperage
Ameraje
Speed
Velocidad
Water Capacity (gal)
Capacidad de Agua (galón)
Weight (lbs.)
Peso (libras)
Dry
Seco
Operating
Lleno
M201A 115 4.7 2 4.8 62 102
M301A / RM301A 115 7.9 2 9.2 107 184
M401A / RM401A 115 10.5 2 11.3 169 263
Specifi cations / Especifi caciones