146 Universal System Air Conditioner
Outdoor Units
3. Protection control
3.1 Discharge Temperature control
3.1.1 Discharge pipe control for Inverter compressor
1) There can be two situations
(a) Sensor is failed (error code for sensor failure will be generated)
(b) Abnormal high temperature discharge temperature (error code for high discharge will be generated)
Both cases unit will stop.
2) Compressor working
(a) If discharge pipe temperature £º T1 No limitation on compressor frequency
(b) T2
≤
discharge pipe temperature £º T off (Hysteresis control) Compressor frequency down by 5Hz and
expansion valve up by 10 pulse in every 1 min.
(c) Discharge pipe temperature
≥
Toff Compressor will be off
Expansion
valve
10
Pulse Up
10
Pulse Up
COMP
Hz
Toff(105)
°
C
T1(90)
°
C
T2(95)
°
C
5 Hz
Down
5 Hz
Down
OFF
Set
Set
D-Pipe temp
Stop control
Set
Set
Set
Summary of Contents for ABNH186HLAB
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Page 126: ...Schematic Diagram 126 Universal System Air Conditioner Ceiling Cassette Type ...
Page 127: ...Schematic Diagram Service Manual 127 Ceiling Duct Type ...
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Page 183: ...P No 3828A22009B Printed in Korea ...