32 | EN
Code Descripon Soluon
1
Compressor over-
current
1. The compressor is temporarily overloaded (for example, liquid
compression).
2. The program does not match the compressor.
3. The U, V, and W lines of the compressor are inversely connected, and the
compressor reverses.
4. Compressor wear (lack of oil, liquid compression lead to wear cylinder
block).
2
Compressor out of
step
1. The compressor is temporarily overloaded (for example, liquid
compression).
2. The program does not match the compressor.
3. The compressor start pressure dierence is too high and low.
8
Compressor phase
loss
1. Cables U, V, and W of the compressor are missed or improperly
connected.
2. The program does not match the compressor.
3. The compressor starts too high and low pressure dierence.
16
DC voltage is too
low
1. Check whether the AC voltage is abnormal.
2. AC power is suddenly cut o, and the DC voltage will be too low when
the converter capacitor is le for the chip to work.
32
DC voltage is too
high
Check whether the AC voltage is abnormal.
257
Communicaon is
abnormal
1. Check whether the communicaon cable is improperly connected.
2. Check whether the baud rate and communicaon address code are set
according to the communicaon protocol.
3. Replace the driving board for tesng.
258
AC phase loss or CT
is disconnected
1. The current transformer on the driving board is damaged during
transportaon.
2. Check whether the current transformer is improperly inserted during
producon.
3. The AC current at the frequency above 40Hz is very small, resulng in
abnormal detecon of the current transformer.
260
AC over-current
or compressor
overpower
1. AC overcurrent (currently available for external models with a separate
lter board), the load is suddenly too large to reduce the frequency.
2. Compressor overpower (combined plate, three-phase 380V, no single
lter plate model) the load is suddenly too large to reduce the frequency
too late.
3. Compressor overpower (combined plate, three-phase 380V, models
without separate lter plate) The compressor starts too high and low
pressure dierence.
Error codes 1 to 128 are displayed in priority. Error codes 257 to 384 are only displayed if the
previous ones do not appear.
If two or more error codes appear at the same me, then the error codes accumulate.
For example, if codes 8 and 16 occur at the same me, the display shows 24.
5. MAINTENANCE
5. MAINTENANCE