Service Manual 143
Outdoor Units
2.2 Low ambient control
Low ambient cooling case : In this situation outdoor fan works in ON/OFF control.
: If the pipe temperature 0°C and it is falling rapidly in that case compressor will run for 5 min & then it will go in
low ambient control. (
❈
Temp. value can be different for each model.)
❈
After the system is stopped by CT cut or heat sink cut-off then the cycle returns to the normal condtiond control.
2.3 Oil return control
2.3.1 Operating Contion
1) When the continuous running time is over 3hr.(option), oil returning operation is made for 3min.
In case of the initial operation, oil returning operation is made, after completing initial operation.
2) After defrost and oil returning operation, the continuous running time is resetted.
2.3.2 Operation Process
1) EEV-Full open, Hot gas bypass valve-On
2) Compressor Step-70Hz + Constant Comp. On(Option)
3) Reversing valve-Off(Process of Off/On, follows defrost operating.)
4) Outdoor Fan-Low step
(T1 = 0)
°
C
(T2 = 0)
°
C
Outdoor pipe temp
O/D fan
Set speed
Off
Off
Set speed
Set speed
Summary of Contents for ABNH186HLAB
Page 66: ...66 Universal System Air Conditioner II Outdoor Units Introduction 67 AUUW B AUUW 0 R410A 69 ...
Page 121: ...Electronic Control Device Service Manual 121 Ceiling Duct Type BH Series ...
Page 122: ...Electronic Control Device 122 Universal System Air Conditioner BG BR Series ...
Page 123: ...Electronic Control Device Service Manual 123 VE Series Ceiling Floor ...
Page 124: ...Electronic Control Device 124 Universal System Air Conditioner VB Series ...
Page 126: ...Schematic Diagram 126 Universal System Air Conditioner Ceiling Cassette Type ...
Page 127: ...Schematic Diagram Service Manual 127 Ceiling Duct Type ...
Page 128: ...Schematic Diagram 128 Universal System Air Conditioner Ceiling Floor ...
Page 183: ...P No 3828A22009B Printed in Korea ...