73
12. Protection
Control
12.1 Restart Control (Time Delay Safety Control)
•
The compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on
again by pressing OFF/ON button at remote control within this period.
•
This control is not applicable if the power supply is cut off and on again.
•
This phenomenon is to balance the pressure inside the refrigerant cycle.
12.2 30 Seconds Forced Operation
•
Once the air conditioner is turned on, the compressor will not stop within 30 seconds in a normal operation
although the intake air temperature has reached the thermo-off temperature. However, force stop by pressing the
OFF/ON button at the remote control is permitted or the Auto OFF/ON button at indoor unit.
•
The reason for the compressor to force operation for minimum 30 seconds is to allow the refrigerant oil run in a
full cycle and return back to the outdoor unit.
12.3 Total Running Current Control
•
When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor
operation will be decreased.
•
If the running current does not exceed X value for 5 seconds, the frequency instructed will be increased.
•
However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for 3
minutes.
Model S9*** S12*** S18*** S24*** S28***
Operation Mode
X (A)
Y (A)
X (A)
Y (A)
X (A)
Y (A)
X (A)
Y (A)
X (A)
Y (A)
Cooling / Soft Dry (A)
5.5
15.0
6.8
15.0
9.3
14.8
12.0
19.0
13.3
19.3
Cooling / Soft Dry (B)
5.0
15.0
6.3
15.0
8.8
14.8
11.5
19.0
12.3
19.3
•
The first 30 minutes of cooling operation, (A) will be applied.
12.4 IPM (Power Transistor) Prevention Control
•
DC Peak Current Control
o
When electric current to IPM exceeds set value of 13.2A (S9NK), 13.1A (S12NK), 17.1A (S18NK), 27.7A
(S24NK)
within 30 seconds, the compressor will stop operation. Then, operation will restart after 1 minute.
o
For second occurrence onwards, if the set value exceeds again within 30 seconds, the compressor will stop
operation. Then, operation will restart after 2 minutes.
o
If this condition repeats continuously for 7 times, all indoor and outdoor relays will be cut off, timer LED will
be blinking “(“F99” is indicated).
•
Overheating
prevention
o
When the IPM temperature raises to 120°C the compressor will stop immediately.
o
Compressor operation restarts after 3 minutes the temperature decreases to 115°C
.
o
If this condition repeats continuously 4 times within 20 minutes, timer LED will be blinking (“F96” is indicated).
(B)
(A)
Outdoor air temperature
38.5°C
37.5°C
Summary of Contents for CS-S9NKV
Page 15: ...15 4 2 3 CU S18NKV CU S24NKV...
Page 16: ...16 4 2 4 CU S28NKV...
Page 17: ...17 5 Refrigeration Cycle Diagram 5 1 CS S9NKV CU S9NKV CS S12NKV CU S12NKV...
Page 18: ...18 5 2 CS S18NKV CU S18NKV CS S24NKV CU S24NKV...
Page 19: ...19 5 3 CS S28NKV CU S28NKV...
Page 24: ...24 7 Wiring Connection Diagram 7 1 Indoor Unit 7 1 1 CS S9NKV CS S12NKV...
Page 25: ...25 7 1 2 CS S18NKV CS S24NKV...
Page 26: ...26 7 1 3 CS S28NKV...
Page 31: ...31 8 Electronic Circuit Diagram 8 1 Indoor Unit 8 1 1 CS S9NKV CS S12NKV...
Page 32: ...32 8 1 2 CS S18NKV CS S24NKV...
Page 33: ...33 8 1 3 CS S28NKV...
Page 41: ...41 9 1 5 Human Activity Sensor Printed Circuit Board...
Page 42: ...42 9 2 Outdoor Unit 9 2 1 Main Printed Circuit Board 9 2 1 1 CU S9NK...
Page 43: ...43 9 2 1 2 CU S12NK...
Page 44: ...44 9 2 1 3 CU S18NK CU S24NK...
Page 45: ...45 9 2 1 4 CU S28NK...
Page 46: ...46 9 2 2 Noise Filter Printed Circuit Board 9 2 2 1 CU S9NKV...
Page 47: ...47 9 2 2 2 CU S28NKV...
