Mitsubishi Electric PUZ-A18NHA4 Service Manual page 44

From the previous page.
Error Code Abnormal point and detection method
4. If displayed address or attribute is
remote controller,
Indoor unit detects abnormality when
indoor unit transmitted to remote control-
ler and there was no reply (ACK).
5. If displayed address or attribute is
FRESH MASTER,
Indoor unit detects abnormality when
indoor unit transmitted to FRESH
MASTER and there was no reply (ACK).
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).
7. If displayed address or attribute is non-
existent,
Case
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 receiving
circuit of indoor unit or remote
controller
1 During sequential operation
of indoor unit and FRESH
MASTER of other refrigerant
system, if indoor unit transmits
to FRESH MASTER while
outdoor 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 receiving
circuit of indoor unit or FRESH
MASTER
1 If the power supply of
LOSSNAY 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
LOSSNAY while outdoor unit
power supply of same refrig-
erant system with LOSSNAY
is turned off or within 2 min-
utes of restart, abnormality is
detected.
3 Contact failure of transmis-
sion wire of indoor unit of
LOSSNAY
4 Disconnection of transmission
connector (CN2M) of indoor
unit
5 Defective transmitting receiv-
ing circuit of indoor unit or
LOSSNAY
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 transmit-
ted because the address
of FRESH MASTER and
LOSSNAY are changed after
sequential operation of FRESH
MASTER and LOSSNAY by
remote controller.
44
Judgment and action
Same as mentioned in "A7" of the previous
page.