Toshiba MM-A0280HT Service Manual page 82

Diagnostic Procedure for Check Code
Check code
[bd]
Mg-SW protective operation
Is the Mg-SW contact faulty?
No
Are the resistance value
characteristics
of TD sensor normal?
Yes
Are the output voltage
characteristics of Pd sensor/Ps
sensor normal?
Yes
Insufficient refrigerant, blockage
Troubleshooting
1. Mg-SW contact deposit protective operation
2. TD sensor error
3. Pd sensor/Ps sensor error
4. Insufficient refrigerant, blockage in pipe
Yes
No
No
83
Operation cause
Turn off the power supply,
and replace Mg-SW.
Sensor error
Sensor error
14