Mitsubishi Electric PUHZ-P200YHA Service Manual page 35

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 transmits
signal to remote controller and there
was no reply (ACK).
5. If displayed address or attribute is
FRESH MASTER, indoor unit detects
abnormality when indoor unit transmits
signal to FRESH MASTER and there
was no reply (ACK).
A7
(6607)
6. If displayed address or attribute is
LOSSNAY, indoor unit detects abnor-
mality when indoor unit transmits signal
to LOSSNAY and there was no reply
(ACK).
7. If displayed address or attribute is
nonexistent.
Case
1 During group operation with
indoor unit of multi- refrigerant
system, if indoor unit transmit
signal to remote controller
while outdoor unit power sup-
ply of one refrigerant system is
put off or within 2 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
1 During sequential operation of
indoor unit and FRESH MAS-
TER of other refrigerant sys-
tem, if indoor unit transmits
signal to FRESH MASTER
while outdoor unit power sup-
ply of same refrigerant system
with FRESH MASTER is put
off or within 2 minutes of
restart, abnormality is detect-
ed.
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
1 If the power supply of LOSS-
NAY is off, indoor unit detects
abnormality when it transmits
signal to LOSSNAY.
2 During sequential operation of
indoor unit and LOSSNAY of
other refrigerant system, if
indoor unit transmits signal to
LOSSNAY while outdoor unit
power supply of same refriger-
ant system with LOSSNAY is
put 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
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 transmits signal
because the address of
FRESH MASTER and LOSS-
NAY are changed after
sequential operation of
FRESH MASTER and LOSS-
NAY by remote controller.
35
Judgment and action
Same as mentioned in "A7" of the previous
page