Panasonic CU-3TZ52TBE Service Manual

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Panasonic CU-3TZ52TBE Service Manual Manual pdf 38 page image

3814.8 Deice Control When outdoor pipe temperature and outdoor air temperature is low, deice operation starts where indoor fanmotor and outdoor fan motor stop, indoor unit horizontal vane close and operation LED blink with compressor ON.14.9 Time Delay Safety Control (Restart Control) The compressor will not restart within three minutes after compressor is stopped. This control is not applicable if the power supply reset or after deice condition.14.10 30 seconds Force Operation Once the compressor starts operation, it will not stop its operation for 30 seconds in order to cycle backcompressor oil. However, it can be stopped using remote control or Auto OFF/ON button at indoor unit.14.11 Total Current Control By referring to table below, during normal (default) operation, the running current refer to Hi values and duringPower Save Mode, the running current refer to Lo values. When the outdoor unit total running current (AC) exceeds X value, compressor frequency will decrease. If the running current does not exceed X value for 5 seconds, compressor frequency will increase. However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for3 minutes.Operation Mode CU-3TZ52TBEX (A) Y (A)Cooling/Soft Dry (A) Hi 12.72 15.67Lo 8.73 15.67Cooling/Soft Dry (B) Hi 12.72 15.67Lo 8.73 15.67Cooling/Soft Dry (C) Hi 12.72 15.67Lo 12.72 15.67Heating Hi 12.72 15.67Lo 8.73 15.6739°C38°C42°C43°C(B)(C)(A)Outdoor air temperature14.12 IPM (power transistor) Protection Control Overheating Prevention Controlo If IPM temperature rises to 80°C, outdoor fan speed will be increased.o When the IPM temperature rises to 95°C, compressor operation will stop immediately.o Compressor operation restarts when temperature decreases to 90°C.o If IPM temperature detected less than -30°C, IPM is judged as open circuit (“F96” is indicated). DC peak current controlo When IPM DC current exceeds set value of 30.0 ± 3.0 A, the compressor will stop.o If the DC peak current detected within 30 seconds after operation starts, compressor will restart after1 minute.o If the DC peak current detected 30 seconds or more after operation starts, compressor will restart after2 minutes.o Within 30 seconds after compressor restarts, if the DC peak current is exceeded set value continuously for7 times, all indoor and outdoor relays will be cut off (“F99” is indicated). Error reset can be done by power supply reset.