Hisense AHM-080HCDSAA - Page 338

317
Troubleshooting
Cause Code of Inverter Stoppage (iTC)
Stoppage Cause
Cause Code of Inverter
Stoppage (iTC)
Cause of failure
IPM Error 1
The instantaneous current of the compressor output is too large,
triggering the hardware protection.
Instantaneous
Overcurrent
2
The compressor outputs overcurrent, and software
protection is triggered when the e󰀨ective value is greater than 13A.
The compressor outputs instantaneous overcurrent,
and software protection is triggered when the peak value is greater
than 22A.
Inverter Fin Thermistor
Protection Activation
3
The IPM temperature is too high, check whether the IPM is in good
contact with the n.
Inverter Voltage Decrease 5 The DC bus voltage is too low, check the input power voltage.
Overvoltage 6 The DC bus voltage is too high, check the input power voltage.
Abnormal fault of
sampling circuit
8
The O.U. main PCB PFC sampling circuit is damaged, and O.U.
main PCB needs to be replaced.
Open Phase Detection 13
There is no current or leakage of current in one phase of the
three-phase output of the compressor. Please check
1. Whether the wiring of the compressor is correct;
2. Whether one phase of the compressor is open circuit;
3. Whether there is major leakage current between the compressor
winding and Ground.
Protection
Device activation (PSH)
18
High pressure switch circuit triggers protection, please check
1. Check whether the wiring of the high pressure switch is correct;
2. The high pressure is too high, causing the pressure switch to be
activated;
3. The state of the high pressure switch is abnormal.
Step-Out Detection 21
The demagnetization of the compressor causes the compressor to
step out. Please conrm whether the compressor is normal.
The actual rotating speed of the compressor does not match the
target speed of the inverter, please conrm whether the compressor
is normal.