WSTECH APS Series - APS Error Codes 50; APS Error Codes 51; APS Error Codes 57

Original Operating Instructions
APS Series – Outdoor Hybrid Inverter
Troubleshooting
APS-Series 120 Operating Instructions v320 EN
Page 134 of 213
7.1.12 APS Error Codes 50
Corrective action:
1. Check if a HIGH-pulse (+24 V
DC
) is applied at (-KF3) port 14 (DI-07) (Figure 21,
Pos. 1).
 If 0 V is applied, apply a HIGH-pulse (+24 V
DC
).
7.1.13 APS Error Codes 51
Corrective action:
1. Check if a HIGH-pulse (+24 V
DC
) is applied at (-KF3) port 24 (DI-08) (Figure 21,
Pos. 1).
 If 0 V is applied, apply a HIGH-pulse (+24 V
DC
).
7.1.14 APS Error Codes 57
Corrective action:
1. Check if the fan of the dehumidifier turns.