Service manual

12-6
TROUBLESHOOTING
SM HADDCI 1-A.2 GB
For S/W 370V and higher (For 467300225R Controller)
No Problem AO 54321
1 OCT shorted/disconnected Yes 00001
2 CTT shorted/disconnected Yes 00010
3 HST shorted/disconnected Yes 00011
4 OAT shorted/disconnected Yes 00100
5 OMT shorted/disconnected Yes 00101
6 Reserved (for Multi Split RGT shorted/disconnected) No 00110
7 Reserved (for Multi Split RLT shorted/disconnected) No 00111
8 Reserved No 01000
9 Reserved No 01001
10 Reserved No 01010
11 IPM Fault Yes 01011
12 Reserved No 01100
13 DC under voltage Yes 01101
14 Reserved No 01110
15 Zero Crossing detection fault Yes 01111
16 Mismatch between IDU & ODU models Yes 10000
17 No Communication Yes 10001
18 Reserved No 10010
20 Heat sink Over Heating No 10100
21 Deicing No 10101
22 Compressor Over Heating No 10110
23 Compressor Over Current No 10111
24 Reserved No 11000
25 Reserved No 11001
26 Compressor Lock Yes 11010
27 Bad Communication No 11011
28 Missing ODU configuration Yes 11100
29 Undefined ODU Model Yes 11101
30 Outdoor Coil Overheating No 11110
31 Operation condition is exceeded Yes 11111
Yes AO => Alarm Operation
12.1.4 Judgement by MegaTool
MegaTool is a special tool to monitor the system states.
Using MegaTool requires:
A computer with RS232C port.
A connection wire for MegaTool.
A special MegaTool software.
Use MegaTool according to following procedure:
Setup MegaTool software: copy the software to the computer.
Connect RS232C port in computer with MegaTool port in Indoor/Outdoor unit controller by 
the connection wire.
Run the software and choose the COM port, you can monitor the A/C system state in monitor 
tab.
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