Panasonic CS-E9PB4EA, Service Manual

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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
1 When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor
operation will be decreased.
2 If the running current does not exceed X value for 5 seconds, the frequency instructed will be increased.
3 However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for
3 minutes.
Model E9PB4EA E12PB4EA
Operation Mode X (A) Y (A) X (A) Y (A)
Cooling / Soft Dry (A) 4.29
14.70
7.00
14.70 Cooling / Soft Dry (B/C) 3.86 6.56
Heating 5.64 8.23
4 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
1 When the IPM temperature rises to 120°C, compressor operation will stop immediately.
2 Compressor operation restarts after 3 minutes the temperature decreases to 110°C.
3 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
1 When electric current to IPM exceeds set value of 20.23 (E9), 30.0 (E12) ± 5.0A, the compressor will stop
operate. Then, operation will restart after 3 minutes.
2 If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will
restart after 1 minute.
3 If the set value exceeded again within 30 seconds after the compressor starts, the operation will restart after
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).