Haier AW07LC2VHA Technical Overview page 10

Indoor System Mode Conflict
The indoor unit is trying to operate in a mode that is opposite
of the mode the outdoor unit is currently operating in. Change
the operating mode to either heat or cool, or the indoor unit
will shut off.
Abnormality confirmation approaches
1. Indoor temperature sensor abnormality:
Under the operation, the normal temperature ranges from
120°F to -30°F. When the temperature goes beyond this
range, the abnormality can be confirmed. If the temperature
goes back into the range, the system will automatically
resume.
2. Indoor heat interaction sensor abnormality:
Under the operation, the normal temperature ranges from
120°F to -30°F. When the temperature goes beyond this
range, the abnormality can be confirmed. If the temperature
goes back into the range, the system will automatically
resume.
3. Indoor/Out door malfunction: When the indoor system
receives the outdoor malfunction codes, it will store the code
into E2 for the malfunction list resume. The indoor system
will continue to operate according to the original status, the
malfunction code will not be revealed or processed.
4. Transmission abnormality:
If the indoor system can't receive the outdoor system for 8
minutes, the communication abnormality can be confirmed
and reported and the outdoor system will be stopped.
PAGE 10
OVERVIEW & INTRODUCTION
Indoor Unit Operating Mode Conflicts
Low Load Protection Control
In order to prevent the frosting of the indoor heat interaction
device, the outdoor system will be stopped if the indoor heat
interaction temperature is 32°F for 5 minutes, but the fan will
continue to operate. The outdoor system will be started again
when the heat interaction temperature is above 108°F, and the
system has been stopped for 3 minutes. The malfunction will
be stored in the malfunction resume and will not be revealed.
High Load Protection Control
The outdoor system will be stopped if the coil temperature is
above 149°F for 2 minutes. The indoor fan will be controlled by
the thermostat. The outdoor system can be restarted when
the coil temperature is below 108°F and the system has been
stopped for 3 minutes. The malfunction will be stored in the
malfunction resume and will not be revealed.
INTRODUCTION