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5. If displayed address or attribute is
FRESH MASTER,
Indoor unit detects abnormality when
indoor unit transmitted to FRESH MAS-
TER 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
Error Code
Abnormal point and detection method
Case Judgment and action
A7
(6607)
6. If displayed address or attribute is
LOSSNAY,
Indoor unit detects abnormality when
indoor unit transmitted to LOSSNAY and
there was no reply (ACK).
1 If the power supply of LOSS-
NAY is turned 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. If 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 transmitted to remote con-
troller 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 2 minutes of restart,
abnormality is detected.
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.
OCH429--2.qxp 07.11.20 9:18 AM Page 44