HTW -AV4WD2N8PLUS Manual De Usuario página 83

ERROR MALFUNCTION
CODE OR PROTECTION
Low DC generatrix voltage
protection
PED PCB failure
FAILURE CAUSE
AND CORRECTIVE ACTION
1. Check the power supply.
2. If the power supply is OK,and check if LED light is OK,
check the voltage PN, if it is 380V, the problem usually comes
from the main board. And if the light is OFF, disconnect the
power, check the IGBT, check those dioxides, if the voltage is
not correct, the inverter board is damaged, change it. 3. And if those IGBT are OK, which means the inverter board is
OK, power form rectifier bridge is not correct, check the bridge.
(Same method as IGBT, disconnect the power, check those
dioxides are damaged or not).
4. Usually if F1 exist when compressor start, the possible
reason is main board. If F1 exist when fan start, it may be
because of inverter board.
1. After 5 minutes of power-off interval, power on again and
observe whether it can be recovered;
2. If it can't be restored, replace PED safety plate, power
on again, and observe whether it can be restored;
3. If it can not be recovered, the IPM module board should
be replaced.
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