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Troubleshooting can present hazards of electricity, rotating parts, sharp edges and weight. Troubleshooting must be done by trained,
experienced technicians only. Improper troubleshooting can result in equipment damage, severe personal injury or death.
Trouble
14. Blinking diagnostic display on control pad
a.
E1
b.
E2
c.
E3
d.
E4
e.
E9
Troubleshooting Chart (Continued)
WARNING
!
Possible Causes
a.
Defective room temperature sensor.
b.
Defective indoor coil temperature sensor.
c.
Defective outdoor coil temperature sensor
(H.P. only).
d.
High refrigerant temperature caused by
dirty filters, coils or fan blades, bad fan mo-
tors, air blockage, short circuiting
condensor air, outdoor louver with high
pressure drop, capillary tube restriction.
e.
Bad communication between control pad
and main PC board. Loose plug connec-
tion, defective control pad or PC board.
Treatment
a.
Replace
b.
Replace
c.
Replace
d.
Clean coils, fans or filters.
Replace fan motor.
Check baffles in sleeve extension.
Check free area of louver.
Replace capillary tube.
To restart compressor, turn unit off then back
on. Wait 3 minutes for random restart.
e.
Check for loose connections.
Replace control pad or PC board.
IM 812 / Page 25 of 28
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