Panasonic CU-5E36QBU-5 Service Manual

Also see for CU-5E36QBU-5: Operating instructions

45 The first 30 minutes of cooling operation, (A) will be applied.13.12 IPM (power transistor) Protection Control Overheating Prevention Controlo If IPM temperature rises to 176°F (80°C), outdoor fan speed will be increased.o When the IPM temperature rises to 203°F (95°C), compressor operation will stop immediately.o Compressor operation restarts when temperature decreases to 194°F (90°C).o If IPM temperature detected less than -22°F (-30°C), IPM is judged as open circuit (“F96” is indicated). DC peak current controlo When IPMDC 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.13.13 Compressor Protection Control (Gas leak detection control 1) Control start conditionso For 5 minutes, the compressor continuously operates and total current is low.o During Cooling or Soft Dry operation:Indoor intake temperature — indoor piping temperature is below 39.2°F (4°C).o During Heating operation:Indoor pipe temperature — indoor intake temperature is below 37.4°F (3°C).o Not during deice control.o Compressor ON with maximum frequency. Control contento Compressor stops (and restart after 3 minutes)o If the conditions above happen 4 times within 60 minutes, the unit will stop operation (“F91” is indicated).13.14 Compressor Protection Control (Gas leak detection control 2) This control detect gas leakage condition to prevent compressor damage. Control start conditiono All connected indoor units capability supply ON.o Compressor ON with maximum frequency.o Not during annual cooling.o Compressor discharge temperature high. Control contento Compressor OFF during this control (“F91” is memorized in EEPROM)o If the above conditions happen 2 times within 60 minutes, indoor units’ Timer LED will blinks (“F91” isindicated at all indoor units)