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(16) PFC Protection
1. After start up the PFC, it should detect the protection signal of PFC immediately; under the condition of PFC protection, it should turn
off the PFC and compressor at one time;
2. It shows the failure is cleared out if PFC Protection stopped working 3 min and recovers to run automatically;
3. If it still can’t run when it occurs PFC protection for 3 times in succession, it is available if presses ON/OFF; and clear the PFC
Protection times when start up PFC for 10min.
(17) Failure Detection for Sensor
1. Outdoor Ambient Sensor: detect the failure of sensor at all times.
2. Outdoor Tube Sensor: You should not detect the failure of outdoor tube sensor within 10 minutes heating operation compressor except
the defrosting, and you could detect it at other time.
3. Outdoor Exhaust Sensor:
(a) The compressor only detect the sensor failure after it start up 3 min in normal mode;
(b) It should detect the exhaust sensor failure immediately in the testing mode.
4. Module Temperature Sensor:
(a) Short-Circuit Detection: the compressor should be detected immediately when the module temperature sensor occurs short-circuits;
(b) Open-Circuit Detection: the compressor should be detected on open-circuit when it runs 3min (it needn’t 30s avoiding the module
over-heated).
(c) Detect the sensor failure at all times in the testing mode.
5. Disposal for Sensor Protection
(1) When the short-circuit of sensor is detected within 30s, It is regarded as the temperature of sensor over-high (or infinitely high), and
now according to the over-high sensor, the machine should carry out the corresponding protection to stop working, and show the
corresponding temperature shutdown protection and sensor failure at the same time (for example: the compressor stops immediately
when the outdoor tube sensor short-circuit, and the machine shall show the overload protection and outdoor tube sensor failure).
(2) When the open-circuit of sensor is detected within 30s, The protection shall be stopped and it shall show the corresponding
sensor failure.
