l.  10F1 20F1: PTC Error 
1.  Error display:   
ODU display: 10F1 20F1   
2.  Applicable models:   
38VMA***HDS5-1 (208/230V-3Ph-60Hz) 
38VMA***HDS6-1 (460V-3Ph-60Hz) 
3.  Error definition: 
4.  After turning the system power on, the DC bus voltage is outside the allowable range for more than 10 seconds.   
38VMA***HDS5-1(208/230V-3Ph-60Hz): 150-500V   
38VMA***HDS6-1 (460V-3Ph-60Hz): 300-900V 
5.  Possible causes: 
•  Improper, disconnected, or damaged wiring from the inverter module to the main board CN36/CN39 
•  Improper or disconnected wiring at PTC of DC filter board 
•  Damaged PTC on the DC filter board 
•  Damaged main board 
 
   
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