Panasonic CS-CE12NKE, Service Manual

Page: 35 / 87

35
13. Protection Control
13.1 Protection Control For All Operations
13.1.1 Restart Control (Time Delay Safety Control)
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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.
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This control is not applicable if the power supply is cut off and on again.
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This phenomenon is to balance the pressure inside the refrigerant cycle.
13.1.2 Total Running Current Control
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When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor
operation will be decreased.
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If the running current does not exceed X value for 10 seconds, the frequency instructed will be increased.
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However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for
3 minutes.
Model CE9NK CE12NK
Operation Mode X (A) Y (A) X (A) Y (A)
Cooling/Soft Dry (A) 4.54 14.76 6.20 14.76
Cooling/Soft Dry (B) 3.43 14.76 5.64 14.76
Cooling/Soft Dry (C) 3.43 14.76 5.64 14.76
Heating 5.49 14.76 8.03 14.76
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The first 30 minutes of cooling operation, (A) will be applied.
13.1.3 IPM (Power transistor) Prevention Control
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Overheating Prevention Control
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When the IPM temperature rises to 100°C, compressor operation will stop immediately.
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Compressor operation restarts after 3 minutes the temperature decreases to 95°C.
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If this condition repeats continuously 4 times within 20 minutes, timer LED will be blinking (“F96” is indicated).
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DC Peak Current Control
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When electric current to IPM exceeds set value of 20.2 A, the compressor will stop operate. Then, operation
will restart after 3 minutes.
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If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will
restart after 1 minute.
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If the set value exceeded again within 30 seconds after the compressor starts, the operation will restart after
2 minutes. 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).