Bosch ODU Split 8 - Error code 62, 65

Error handling instructions for Split outdoor unit
Split ODU – 6 720 817 722 (2015/06)
30
2.17 Error code 62, 65
2.17.1 Error diagnosis and countermeasure flow chart
▶ Short circuit check: if temperature 130 °C
▶ Open circuit check: if temperature < – 30 °C
System will go in self diagnosis (error 65) is displayed and ODU stops.
Check point
1. Check resistance between no. 19 pin and no. 20 pin of PCB PFC
module
2. Resistance value should be in 7k 10% (at 25 °C).
Fig. 28 Error codes 62, 65 check the PFCM
Display code Title Cause of error Check point & Normal condition
62 Heat sink temp high • Heat sink sensor detected high
temperature (85 °C)
1. Part no. :EBR37798101~09
-Check the heat sink sensor: 10k at 25 °C (unplugged)
-Check the outdoor fan is running correctly
2. Part no. :EBR37798112~21
-Check the soldered condition in the 22, 23 pin of IPM,
PFCM
-Check the screw torque of IPM, PFCM
-Check the spreadable condition of thermal grease on IPM,
PFCM
-Check the outdoor fan is running correctly
65 Heat sink sensor • Connector connection error
• Faulty PCB
• Faulty sensor (Open / Short)
1. Normal resistor: 5k at 25 °C (unplugged)
2. Normal voltage: 2.5Vdc at 25 °C (plugged)
3. Refer to sensor resistance table
Table 34 Error code 61
Is there good screw
torque of IPM, PFCM?
No -> 1. Tighten the screw of IPM,
PFCM
Yes
Is there normal
resistance between 22
and 23 Pin of IPM,
PFCM?
Is there normal thermal
grease on IPM, PFCM?
Is IPM, PFCM normal?
No ->
1. Change the inverter PCB
Yes
Recheck power and
installation condition
Table 35 Error diagnosis and countermeasure chart
27 26 25 24 23 22 21
0.4 ~ 0.6 V
6 720 817 722-36.1I