Case Study - E205 (Internal Communication Error Of The Outdoor Unit C-Box) - Samsung AM072BXV Series Service Manual

Troubleshooting
4-4 Case study for trouble shoots (cont.)
4-4-6 Case study – E205 (Internal communication error of the outdoor unit C-box)
Outdoor unit
display
Duct, Cassette (1/2 Way),Console, Celing
Operation Defrost Timer Fan
Indoorunit
display
×
※ ● : ON ◑ : Flash ×: OFF
Judgment
• Communication error between the C-Box PBA.
Method
• Communication wire inside the C-Box is unconnected.
Cause of
problem
• Main PBA defective.
1) No communication jumper connector on Inverter PBA.
2) No power supply to inverter PBA.
Possibility
3) Poor connection of communication wiring and connector.
4) Wrong HP information in EEPROM.
Samsung Electronics
Filter/
Operation Defrost Timer Filter Operation Timer Turbo 24℃
MPI
× ◑ ◑ ×
Comm jumper
Connection Inv1 and Inv2
Cassette (4/Mini4 Way)
× ◑ ◑ ×
Wall-mounted (NeoForte)
× × ◑ ◑
<PBA Connection order>
MAIN PBA
FAN PBA
INV PBA 1
INV PBA 2
Communication jumper
27℃
×
160