37
Error Code
Abnormal points and detection method
Case
Judgment and action
A7
(6607)
5. If displayed address or attribute is
FRESH MASTER, indoor unit detects
abnormality when indoor unit transmit-
ted to FRESH MASTER and there was
no reply (ACK).
1
During sequential operation of
indoor unit and FRESH MAS-
TER of other refrigerant sys-
tem, if indoor unit transmits to
FRESH MASTER while out-
door unit power supply of
same refrigerant system with
FRESH MASTER is turned off
or within 2 minutes of restart,
abnormality is detected.
2
Contact failure of transmission
wire of indoor unit or FRESH
MASTER
3
Disconnection of transmission
connector (CN2M) of indoor
unit or FRESH MASTER
4
Defective transmitting receiv-
ing circuit of indoor unit or
FRESH MASTER
6. If displayed address or attribute is
LOSSNAY, indoor unit detects abnor-
mality when indoor unit transmitted to
LOSSNAY and there was no reply
(ACK).
1
If the power supply of LOSS-
NAY is off, indoor unit detects
abnormality when it transmits
to LOSSNAY.
2
During sequential operation of
indoor unit and LOSSNAY of
other refrigerant system, if
indoor unit transmits to LOSS-
NAY while outdoor unit power
supply of same refrigerant sys-
tem with LOSSNAY is turned
off or within 2 minutes of
restart, abnormality is detect-
ed.
3
Contact failure of transmission
wire of indoor unit of LOSS-
NAY
4
Disconnection of transmission
connector (CN2M) of indoor
unit
5
Defective transmitting receiv-
ing circuit of indoor unit or
LOSSNAY
7. When displayed address or attribute is
nonexistent
1
The unit of former address
does not exist as address
switch has changed while the
unit was energized.
2
Abnormality is detected when
indoor unit transmitted
because the address of
FRESH MASTER and LOSS-
NAY are changed after
sequential operation of
FRESH MASTER and LOSS-
NAY by remote controller.
From the previous page.
4. If displayed address or attribute is
remote controller, indoor unit detects
abnormality when indoor unit transmit-
ted to remote controller and there was
no reply (ACK).
1
During group operation with
indoor unit of multi- refrigerant
system, if indoor unit transmit
to remote controller while out-
door unit power supply of one
refrigerant system is turned off
or within two minutes of
restart, abnormality is detect-
ed.
2
Contact failure of transmission
wire of remote controller or
indoor unit
3
Disconnection of transmission
connector (CN2M) of indoor
unit
4
Defective transmitting receiv-
ing circuit of indoor unit or
remote controller
Same as mentioned in “A7” of the previous
page
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