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4.
Error that affects normal operation of electricity charge apportionment
function
Errors and their main causes related to electricity charge apportionment, detected by the BACnet
Gateway are described.
(1)
Generation conditions
Generated when a unit is detected, that does not respond with the information necessary for elec-
tricity charge apportionment (non-communicating unit), while the electricity charge apportionment
data collection is performed.
Check the communication status of indoor and outdoor units, if the following error is present.
Error Code
F21
F22
16
17
*
This error is raised if there is no communication with outdoor unit for more than 70 minutes and with indoor
unit for more than 30 minutes.
(2)
Processing of errors by BACnet
●
Electricity charge apportionment error with the unit address are displayed for the non-communi-
cating unit.
The generation time and recovery time are recorded in the error history as with the other errors.
●
In the electricity charge apportionment calculation, non-communicating unit is handled the
same as an indoor unit whose operation is stopped by a remote controller.
●
In the electricity charge apportionment calculation, non-communicating unit is handled as fol-
lows:
· Non-communicating indoor unit: Handled the same as an indoor unit whose operation is
stopped by a remote controller
· Non-communicating outdoor unit: When the non-communicating unit is a master unit, since the
minimum data necessary for electricity charge apportionment is not collected, apportionment
calculation of the relevant refrigerant system is not performed. (Electricity charge becomes "0".)
When a slave unit is the non-communicating unit, calculation is performed as if the slave unit
does not exist.
(3)
Recovery conditions
When the data necessary for electricity charge apportionment can be acquired from the relevant
unit, the electricity charge apportionment error is reset.
(4)
Main error generation causes
●
Electricity charge apportionment errors are mainly generated when the power breaker of a unit
is switched off.
(Because apportionment data is not sent when the power breaker is switched off.)
When the power breaker of only part of the units in a refrigerant system is switched off, outdoor
unit trouble may occur.
Therefore, if there is a unit whose power breaker is switched off, quickly recover the power by
switching on the breaker.
●
This error may also occur when the communication is disrupted due to disconnection of VRF
communication line. Check that the communication line is not disconnected.
Copyright© 2010-2017 Fujitsu General Limited. All rights reserved.
System tool communication adaptor connection error
System tool communication error (no data)
Peripheral unit communication error
Electricity charge apportionment error
®
Gateway
55
Error Contents
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