​​​​This article discusses the error codes of AKG WMS 450 and 470 wireless systems, what they indicate, and how to approach troubleshooting.

Receiver Only:

ERR.>SYS< 
• Frequency settings cannot be changed.

​1.  Switch power to receiver OFF and back ON after about 10 seconds.

​2.  If problem persists, contact Technical Support at 844-776-4899, option 3.
 

ERR.>PRE< 
• Error in selected Preset.

​1.  Continue with previous Preset.

​2.  Select error-free Preset.

​3.  If problem occurs frequently, contact Technical Support.
 

TXBand 
 • Transmitter frequency band is not identical with receiver frequency band, OR

 • RF output too high/low.

​1.  Use transmitter with the same frequency band as the receiver.

​2.  Use transmitter with lower/higher RF output.

Receiver and Transmitter:

ERR.>USR< 
• Last setting cannot be loaded.

​1.  Set frequency and squelch threshold again.

​2.  If problem occurs frequently, contact Technical Support.

ERR.>RF< 
• PLL error.  (Receiver cannot lock on to selected frequency.)

​1.  Set different frequency.

​2.  If problem persists, contact Technical Support.

Err.>IR< 
• Infrared transmission failed.

​1.  Point transmitter infrared sensor directly at receiver infrared emitter from a distance of approx.  2 inches (5 cm).

Transmitter Only:

>-h< 
• Transmitter cannot identify battery as dry or rechargeable type, OR

•​ Transmitter was switched on during charging.

​1. Remove battery and reinsert after approx.  five seconds.

​​2. Remove transmitter from charger, switch off, and restart charging (cf. CU 400 manual)

>ChArGE< (rechargeable battery only)
• Battery is not fully charged.

​1. Charge transmitter using CU 400 charger.

​​2. Replace transmitter battery with new dry or fully charged rechargeable battery.