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When the ERV equipment is displayed as a network error state (code 242)
in User Interface of the ACP IV
When the ERV equipment is displayed as a network error state (code 242) as followed, in User
Interface,
which is the web server program of the ACP IV, please check the following categories.
• Check if the BUS-A and BUS-B of RS-485 cable are incorrectly connected.
• Check if there is a communication defect between the remote controller and the indoor unit.
• Check if the PI485 DIP switch is incorrectly set.
• Check if the indoor unit address for the central control is not set.
The CH242 (network error) keeps occurring and disappearing in the ACP
IV controller.
Case of incorrect connection of RS-485 communication line
If each communication line is connected altogether as in the following figure, the communication line
must be separated.
PACP4B000
PQNFB17C0
ACP IV
PI485
PI485
LON
N/A
SVC
Installing ACP IV
PI485
PI485
43
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