16
LT-2027
EN
Symptom Action (for symptoms listed at left, follow the steps listed below)
Blower does
not start when
powered up
1. Remove the cover. See Service Instructions.
2. Search for disconnected wire harnesses and reconnect, if
needed.
3. Determine if fuses are open.
Measures voltages on both sides of the F1 fuse. If 12 +/-.5 VDC
is not present on both sides of the fuse, the fuse is open and the
power supply board should be replaced. See Service Instruc-
tions.
Measure resistances, without AC power to unit, on the F2 and
F3 fuses with an ohmmeter. If either fuse is open, replace the PC
control board. See Service Instructions.
4. If all fuses are closed, install a blower known to operate properly,
see Service Instructions, and power up the unit.
If the new blower operates properly, replace the old blower.
If the new blower does not operate properly, replace the control
board. See Service Instructions.
5. Replace the cover. See Service Instructions.
E03, E04, or
E07 errors
display
OR display
is blank
E01 error code
displays
Replace the control board
Blower is loud 1. Remove the cover and control board. See Service Instructions.
2. Inspect the assembly of the foam, blower, and silicone isolator.
See Blower Replacement instructions for correct placement.
3. Inspect the blower for visible space between the blower halves
and press halves back together, if needed.
4. If the assembly is not correct, reassemble the components.
5. If assembly is correct, replace the blower. See Service Instruc-
tions.
6. Replace the control board and cover. See Service Instructions.
Blower does
not start when
powered up
and E06 error
displays
1. Remove the cover. See Service Instructions.
2. Search for disconnected, occluded, or kinked tubing on the pres-
sure sensor, fl ow sensor, and chassis. Correct any issues.
3. Search for damage to the chassis, any foam pieces, and/or tubing
and replace the component, if damaged.
4. Remove the control board. See Service Instructions.
5. Search for signs of water damage to the blower assembly, pres-
sure sensor, and/or fl ow sensor and replace, if damaged.
6. Inspect the blower. If a space is visible between the top and bot-
tom sections, re-connect the halves to eliminate the space.
7. Re-calibrate the pressure and fl ow sensors.
8. If the above steps did not eliminate the error, replace the control
board. See Service Instructions.
9. Replace cover. See Service Instructions.
8. Troublesh ooting
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