Troubleshooting - naks 7300 DD Guia De Inicio Rapido

Problem Possible Cause
Failure to 1. No electrical power to
start or no air unit
• Fuse blown
delivery
• Circuit breaker tripped
• Electric cord unplugged
or damaged
2. Belt too loose or tight
3. Motor overheated
• Belt too tight
• Blower bearings dry
• Motor pulley diameter
too large
4. Motor locked
1. Insufficient air exhaust
Inadequate
air delivery
with cooler
2. Belt too loose
running
3. Pads plugged
4. Motor underloaded
Inadequate 1. Inadequate exhaust in
cooling house
2. Pads not wet
• Pads plugged
• Open spots in pads
• Trough holes clogged
• Pump not working prop-
erly

Troubleshooting

Remedy
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
• Adjust pulley to cor-
rect diameter
4. Replace motor
1. Open windows or
doors to increase air
flow
2. Adjust belt tension or
replace if needed
3. Replace pads
4. Adjust pulley to full
load ampere rating of
motor
1. Open windows or
doors to increase air
flow
2. Check water distribu-
tion system
• Replace pads
• Repack pads
• Clean trough and
unplug holes
• Replace or clean pump
(Unplug unit)
-4-
Problem Possible Cause
Motor cycles 1. Low voltage
on and off 2. Excessive belt tension
3. Blower shaft tight or
locked
4. Bearings dry
5. Motor pulley diameter
too large causing motor
overload
Noisy 1. Bearings dry
2. Wheel rubbing blower
housing
3. Loose parts
Musty or 1. Stale or stagnate water
unpleasant in cooler
2. Pads mildewed or
odor
clogged
3. Pads not wetting prop-
erly
• Trough holes clogged
• Pump not working
properly
Water drain- 1. Float arm not adjusted
properly
ing onto roof
2. Overflow assembly
leaking
1. Inadequate exhaust
Excessive
humidity in
house
Remedy
1. Check voltage
2. Adjust belt tension
3. Oil or replace bearings
(Unplug unit)
4. Oil bearings
5. Adjust pulley so full
load ampere rating of
motor is not exceeded
1. Oil bearings
2. Inspect and realign
(Unplug unit)
3. Tighten loose parts
1. Drain pan and clean
pads
2. Replace pads
3. Check water distribu-
tion system
• Clean
• Replace or clean pump
(Unplug unit)
1. Adjust float
2. Tighten nut and over-
flow pipe.
1. Open doors or win-
dows