TCL -WiredCasCtrl User Manual page 13

Classification
Error
Protection
Code
C0 The CAN communication goes wrong in an all-round
way.
C1 Multiple main control panel errors
C2 The number of outdoor unit modules is abnormal
(Deficiency/increase)
The communication between the main control panel and
C3
the variable-frequency compressor drive goes wrong.
The communication between the main control panel and
C4
the variable-frequency fan drive goes wrong.
The communication between the indoor unit and the wire
C5
controller goes wrong.
P0 Module protection
P1 Over/Under-voltage protection
P2 Over-current protection (Variable-frequency compressor)
P3 Outdoor unit protection
Exhaust high-temperature protection (Variable-frequency
P4
compressor or Slave F3)
Under-cooling protection in the cooling mode (Indoor unit
P5
coil temperature protection)
Over-heating
P6
protection)
Over-heating
P7
temperature protection)
P8 Outdoor high/low-temperature protection
P9 Drive protection (load abnormal)
The modes
PA
communication goes wrong.
d1 Indoor fan protection
d2 Auxiliary electric heating protection
d3 Water full protection
d4 Anti-freezing protection
d5 The modes conflict.
d6 The IP address of the indoor unit is abnormal.
d7 The capacity dial is wrong.
d8 The engineering numbers conflict.
Error Description
protection
cooling mode
protection
heating mode
conflict and
in
(Condenser high-temperature
in
(Indoor unit
the top air-out
the
the
coil
board