Compressor Current Detection Circuit - Sanyo KH2442 / CH2442 Service Manual

Split system air conditioner
Hide thumbs Also See for KH2442 / CH2442:
Table of Contents

Advertisement

2-15 Compressor Current Detection Circuit

The Compressor Current Detection Circuit detects the compressor current and,
depending on the current range, can stop the compressor motor so it will not be
damaged by overcurrent.
Overcurrent can be caused by several factors, particularly mechanical seizing of the
compressor or liquid backflow. Either of these conditions can hold the compressor
to run, and thus drawing so much current that the motor can burn out.
Comp. Amps.(A)
Rated Current
value
Outdoor Model
CH2442
CH3642
CH4242
Overload Protection
• When the detected current is 1.17 – 1.4 times greater than the rated current value (Is) and continues
for 30 seconds, both compressor and outdoor fan stop (Thermostat OFF).
• After 3-minute pause, if the air conditioner is ready for Thermostat ON, it starts again. However, if the
condition mentioned above repeats twice within 30 minutes, the remote controller displays the alarm
message H01, compressor overload.
Locked Compressor Cut-off
• When the detected current is 1.4 times greater than the rated current value (ls) and continues for 2
seconds, both compressor and outdoor fan stop (Thermostat OFF).
• After 3-minute pause, if the air conditioner is ready for Thermostat ON, it starts again. However, if the
condition mentioned above repeats twice, the remote controller displays the alarm message H02,
compressor locked.
Failure of Compressor Current Detection
• When the Compressor Current Detection Circuit fails to detect the compressor current within 2
seconds after compressor starts, both compressor and outdoor fan stop (Thermostat OFF).
• After 3-minute pause, if the air conditioner is ready for Thermostat ON, it starts again. However, when
the circuit fails to detect the current twice in a row, the remote controller displays alarm message H03,
Failure of compressor Current Detection.
Locked Comp. Cut-off Range
Is
1.4
Overload Protection Range
Is
1.17
Normal Operation Range
Is
Rated Current Value
ls (A)
17.1
27.5
34.7
Chart Summary and Explanations
2. Processes and functions
0447_M_S
Overload Protection
ls x 1.17 (A)
20.0
32.2
40.6
II - 17
Fig. 18
Locked Compressor Cut-off
Is x 1.4 (A)
23.9
38.5
48.6
SM830082
Section
1
2
3
4
5

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents