3.8 F6: Electronic ball valve connection failure (for MS01) 
 Digital display output 
 
 Description 
  Electronic ball valve (EBVA/EBVB/EBVC) connection failure. 
  All units stop running. 
  Error code is displayed on the unit with the error. The indoor unit display board or wired controller connected under 
this MS displays "F8" fault code. 
 
 Trigger / recover condition 
  Trigger condition: The main control board cannot receive the feedback signal of EBV. 
  Recover condition: The main control board can receive the feedback signal of EBV. 
  Reset method: Manually restart. 
 
 Possible causes 
  Electronic ball valve coil doesn't connect properly or malfunction. 
  MS PCB damaged.