Operating Instructions

Fault Codes
Digital Keypad
344 | 443
Cause
Corrective Actions
Malfunction caused by interference
● Verify the wiring and grounding of the communication circuit.
● Separate the communication circuit from the main circuit, or wire in 90 degree for effective
anti-interference performance.
Different communication setting from the
upper unit
Check if the setting for Pr.09-02 is the same as the setting for the upper unit.
Disconnection or bad connection of the
cable
Check the cable and replace it if necessary.
ID*
Display on LCD Keypad
Fault Name
Fault Descriptions
121
Internal communication
error (CP20)
Internal communication time-out
Action and Reset
Action level
Software detection
Action time
Immediately act
Fault treatment parameter
N/A
Reset method
N/A
Reset condition
N/A
Record
Yes
Cause
Corrective Actions
Internal communication error
Contact Technical Support.
ID*
Display on LCD Keypad
Fault Name
Fault Descriptions
123
Internal communication
error
(CP22)
Abnormal internal communication
Action and Reset
Action level
Software detection
Action time
Immediately act
Fault treatment parameter
N/A
Reset method
N/A
Reset condition
N/A
Record
Yes
Cause
Corrective Actions
Internal communication error
Contact Technical Support.
ID*
Display on LCD Keypad
Fault Name
Fault Descriptions
124
Internal communication
error (CP30)
Abnormal internal communication
Action and Reset
Action level
Software detection