Toshiba Carrier BMS-IFBN1281U-UL Service Manual page 96

BN interface
Problem
A request frame was sent to
the BN interface via BACnet
communication but no
response frame was
returned.
A Notice Code has been
issued on the air conditioner
side, but the value of the
"Notice Code" object has not
changed.
A High_Limit error or
Low_Limit error occurred
when the temperature
setting was changed with the
"Auto Cool Set temperature
Control" object or "Auto Heat
Set temperature Control"
object.
96 -EN
Cause
• The IP Address or network mask setting is
wrong
• The LAN cable is not connected
• The LAN port is malfunctioning
• BN interface is not running
• This object can be used by the TU2C-
LINK model.
• In order to issue a notice code, the notice
code must be registered on the air
conditioner side.
The temperature settings must meet the
following requirement.
"Auto cool temperature setting ≥ Auto heat
temperature setting"
Action
Check the following.
• Whether a response is sent when a ping
command is sent from a PC.
• Whether the LAN cable is connected to the
BN interface.
• Whether LED1 in the LAN port of the BN
interface is lit.
• Whether LED2 in the LAN port of the BN
interface is lit or blinking.
Check the following.
• The LED-L1 is in the "Operating normally"
state shown in "Section 8-1.".
• If BN interface is starting up, wait until it starts
up normally.
For details of notice code, refer to the air
conditioner service manual.
Set the temperature so that the requirement
indicated in the left-hand column is met.
Service Manual