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(3) Resetting of trouble/alarm
The resetting method differs depending on the equipment generating trouble/alarm.
Trouble of indoor unit
Switches over the indoor unit in trouble from [Run] to [Stop].
Trouble of outdoor unit
Switchovers all indoor units in the refrigerant system from [Run] to [Stop].
5.8.2 Health check of LM ADAPTER - - -
④
,
⑤
Several factors can be considered as the cause to disable the communication of the master system with LM
ADAPTER. Depending on the function of the BMS or the system configuration, conduct health check (to judge
the life) by combining each detecting method.
(1) Detection by Node Object
The Node Object is an exclusive variable to conduct health check (to judge the life) on LM ADAPTER. This is
effective when the application of LM ADAPTER is crashed under the condition allowing LON communication,
or to detect the recovery timing of power failure.
The node object uses the input variable
【
nviRequest
】
and output variable
【
nvoStatus
】
in a pair. The
output variable returns the value corresponding to the requested value when only the input variable is
renewed. The response can be performed if the application is working regardless of the status of the local
side (M-NET).
(2) Detection by effectuation of communication
When Ackd is used as the communication service of LON communication, the fault of LON communication
can be monitored by the presence of Ack. However for the generating spot of the communication error, it is
required to judge comprehensively taking the communication status of other node into consideration.
5.9 Emergency stop
In the case when air conditioners are stopped (emergency stop) collectively, it is considered that the
communication with the master system may not be performed after stopping. For this reason, the present
status will be maintained until “Effective Time_1
【
nciEffectTm_1
】
” has passed once emergency stop was
received. Even after releasing the emergency stop, the air conditioner will continue to stop unless receiving
the run request.
