OEM DC BWA-SS-12 Installation And Maintenance Instructions Manual - Alarm Messages
Alarm Messages
The cause of alarm ‘IPM MODULE’ could be:
1
ǃThe communications between Module and outdoor main circuit board is jamming;
2
ǃModule is jamming and can not detect current or compressor;
3
ǃModule can not start compressor;
4
ǃModule’s rated 15VDC voltage is not steady
5
ǃModule’s current overload˗
How to do:
1. Please check if all terminals connections among circuit boards were good, whether some of the wire
damaged;
2. Please check if the compressor wire connection loose (on the top of compressor);
3. Please measure each two of the connections (on the top of compressor)’s resistance, if the resistance are
always the same, means the compressor is fine.
there 3 connections on the top of compressor , you need
to measure each two 's resistance, for example , let 's say the connections are A, B, C, then you need to
measure the resistance of AB, AC, BC;
4. please check wire connection between the outdoor circuit board and module; see the follow picture
5. Check the DC voltage between terminal P and N if normal, the DC voltage should be:
AWA70/90-DC: 380VDC
AWA120150-DC (single phase): 280VDC
AWA120/150-DC (trinal phase): 540VDC
P
N
Control
40