Panasonic CS-HE9DKE, Service Manual, Page: 37 / 88

9.15.1. Time Delay Safety Control
9.15. Protection Control
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Compressor will not start for two minutes after stop of the operation.
9.15.2. 30 Seconds Forced Operation
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• •
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Once compressor starts the operation, it will not stop its operation for 30 seconds. However, it can be stopped with the remote
controller or the Auto button on the indoor unit.
9.15.3. Total Running Current Control
1. When the total running current exceeds I1, compressor operation frequency is reduced. If it reaches below I1, the operation
frequency is increased. (But, up to programmed frequency.)
2. If total running current exceeds I2, compressor is stopped immediately.
3. If it happens three (3) times within 20 minutes, operation will be stopped and Timer LED blinks. (“F98” is activating.)
Running current CS-HE9DKE CS-HE12DKE
Cooling I1 4.5A 5.8A
I2 12.5A 12.5A
Heating I1 7.2A 9.6A
I2 12.5A 12.5A
9.15.4. IPM (Power transistor) Protection Control (DC Peak detection)
Abnormal Current Control
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• •
•
If inverter load current (DC peak) exceeds a rated value, compressor will be stopped immediately. When the excess
occurs within 30 seconds after operation, it restarts in 1 minute and when after 30 seconds, restarts in 2 minutes.
• • • •
If the excess continuously occurs 7 times within 30 minutes after compressor starts, the unit will be stopped and timer
lamp on the indoor unit will be blinking. (“F99” is to be confirmed.)
IPM Overheating Prevention Control
• • • •
If temperature of IPM exceeds 103°C, compressor will be stopped. It will restart in 2 minutes. Temperature for restarting:
90°C.
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• •
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If the excess occurs 4 times within 30 minutes after compressor starts, the compressor will be stopped and timer lamp
on the indoor unit will be blinking. (“F96” is to be confirmed.)
9.15.5. Compressor Overheating Prevention Control
1. If discharge pipe temperature exceeds 100°C, compressor power will be limited.
2. If discharge pipe temperature exceeds 112°C, compressor will be stopped.
3. If the above excess occurs 4 times per 10 minutes, timer lamp will be blinking. (“F97” is to be confirmed.)
9.15.6. Outdoor High Pressure Prevention Control (Cooling and Dry operations)
1. If outdoor heat exchanger temperature exceeds 63°C in cooling or dry operation, compressor will be stopped.
2. Timer lamp is not blinking. (“F95” is memorized, then.)
9.15.7. Compressor Protection Control (Refrigeration Cycle Abnormality)
In Cooling and Dry operations
1. When compressor is operated continuously for 5 minutes in the maximum cooling power: a running current of 0.6 - 1.2A
(excl.) and “[Indoor intake air temperature] - [Indoor heat exchanger temperature]” < 4°C, compressor will be stopped.
2. If the above excess occurs twice for 20 minutes, timer lamp is to be blinking. (“F91” is to be confirmed.)
In Heating operation
1. When compressor is operated continuously for 5 minutes in the rated heating power: a running current of 0.6 - 1.2A (excl.)
and “[Indoor heat exchanger temperature] - [Indoor intake air temperature]” < 5°C, compressor will be stopped.
2. If the above excess occurs twice for 20 minutes, timer lamp is to be blinking. (“F91” is to be confirmed.)
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CS-HE9DKE CU-HE9DKE / CS-HE12DKE CU-HE12DKE