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Problem:
No heating or cooling but fans and compressor are running
Likely Causes
Reversing solenoid
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Problem:
Unit not functioning and no LED light indication on ceiling assembly
Likely Causes
No power to unit
Damaged or loose
Communication cable
Board failure
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Compressor
Outdoor Coil
General Terminal Wire Box
Figure 3
Outdoor Fan
Correction
Power off unit, remove shroud and switch on power. Check that the solenoid is operating.
Replace if defective. If reversing valve solenoid is functioning correctly, then replace
reversing valve.
Correction
Check power supply to the unit.
Unscrew and disconnect ceiling assembly (see installation manual). Check to ensure that the
Communication cable is connected correctly and not damaged.
First, replace electronic board in ceiling assembly. If unit still does not operate, replace
main control box (See Figure 2).
Reversing Valve
Indoor Blower
FIGURE 1
4
Inside Control Box
Figure 2
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