Manual

20
Test the Blower
Plug in the blower.UÊ
Power up the system and activate the blower.UÊ
If the fuse blows, then there is a blower problem.UÊ
If the fuse does not blow, the combined pump and UÊ
blower amperage may be excessive. To verify this, first
check with your spa manufacturer for amperage draw
limits on each device.
Since the blower should now be running, you can check UÊ
the amperage draw with an ammeter by measuring
around the black blower wire and compare with
manufacturer’s specifications.
TEST THE AMPERAGE DRAW
Turn off the power, UÊ
disconnect the blower,
make sure the pump is
plugged in, and restore
power.
Start the pump and UÊ
switch to high speed (if
available), this should
draw the most current.
Make sure all jets and UÊ
valves are open.
Check the amperage UÊ
at the red pump wire.
Compare your reading
with manufacturer specifications. (If the other plug-in
devices exist, they should be tested in the same way.)
If the amperage draw for each device is within UÊ
manufacturer’s specifications, the problem could be a
nuisance spike in the pump, or water in the blower.
NOTE: These slow-blow fuses are not always discolored
when blown. Always test continuity of a fuse with
an ohmmeter.
NOTE: Miswiring of the spa is the most common reason for
this fuse to blow. However, a lightning strike in the area is a
possible, though less likely, cause of the failure.
NOTE FOR ALL SYSTEMSUÊ In each situation, the most
likely reason for the system power input fuse to blow
is a pump problem. However, on occasion, a blower
problem may also cause this fuse to blow if a 10A blower
fuse is not built in.
Once the power input fuse has been changed
Probe the red wire and the white neutral wire. Again, UÊ
voltage must be between 108 and 132 V.
Check the voltage between the black and red UÊ
wires again. Acceptable voltage range is between 216
and 264 V.
THESE READINGS SHOULD BE TAKEN UNDER
PEAK LOAD CONDITIONS.
Important
If the voltage is not in the acceptable range, call an
electrician or the local electric company to diagnose
the problem.
TO DETERMINE THE CAUSE OF A BLOWN POWER
INPUT FUSE
Perform the following sequence of tests.
Test the System
Turn the power off.UÊ
Be sure to replace the system power input fuse with the UÊ
same type.
Unplug the blower and all pumps.UÊ
Restore the power and verify system operation.UÊ
If the fuse blows, then re-check the internal system UÊ
wires and connector for burns, cracks or cuts in
insulation.
If the fuse does not blow, turn the power off and plug in UÊ
the pump.
NOTE: Be sure to test each device individually.
Test the Pump
Restore the power and activate the pump.UÊ
If the fuse blows, there is a pump problem.UÊ
If the fuse does not blow, turn off the power.UÊ
Diagnosing M7 Topside Control Panels (cont.)