12. Protection Control
12.1
Protection Control For All Operations
12.1.1
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.
12.1.2
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
Cooling/Soft Dry (X)
Y
•
The first 30 minutes of cooling operation, (A) will be applied.
12.1.3
IPM (Power Transistor) Prevention Control
•
Overheating Prevention Control
When the IPM temperature rises to 120°C, compressor operation will stop immediately.
o
Compressor operation restarts after 3 minutes the temperature decreases to 110°C or 95°C (S24, 28NK).
o
If this condition repeats continuously 4 times within 20 minutes, timer LED will be blinking ("F96" is indicated).
o
•
DC Peak Current Control
When electric current to IPM exceeds set value of 18.5A (S9, 12NK) and 30.0 ± 5.0A (S18NK, S24NK,
o
S28NK), the compressor will stop operate. Then, operation will restart after 3 minutes.
If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will
o
restart after 1 minute.
If the set value exceeded again within 30 seconds after the compressor starts, the operation will restart after
o
1 minute. 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).
S9NKR
S12NKR
A
5.41
B
5.03
C
5.03
15.00
S18NKR
6.57
6.57
6.13
6.13
6.13
6.13
15.00
15.00
54
S24NKR
S28NKR
12.48
12.64
12.48
12.14
11.46
11.10
19.00
19.00