DuctlessAire DA-09, Service Manual

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Service Manual
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pipe is below 23DegF (programmable data 27#) in one minutes continuously and the
compressor has been continuously working for three minutes, then the system will come
into the defrosting status.
C After the waiting time of the air conditioning is longer than thirty minutes, the unit
will come into the heating mode after been started up. Or it will come into the heating
mode at the first time of powering on. If the temperature of the outdoor coil pipe is below
28.4DegF , then the air condition will firstly come into the defrosting status.
The conditions of exiting the defrosting status: (only meet one of the following
conditions, the unit will exit the defrosting status)
A When the sensor temperature of the outdoor coil pipes is above 59DegF (programmable
data 29#), the unit will exit the defrosting status.
B When the defrosting time is longer than fifteen minutes, the unit will exit the
defrosting status.
Reversing Valve
The reversing or 4 way valve is energized for HEATING in a
DuctlessAire
unit. If the
unit does not produce heat when in the Heat Pump mode, check for line voltage starting at
the Indoor unit terminal, and follow that voltage out via the interconnecting wire to the
solenoid coil on the valve.
Reversing valve coils are line voltage, again units do not use any 24V AC controls
Over heating protection
When the inspected and measured temperature of the indoor coil Tp1 is higher than
or equal to 145DegF(programmable data 26#), the compressor, outdoor blower will