Mitsubishi Electric PUHZ-P100VHA.UK Service Manual page 37

From the previous page.
Error Code Meaning of error code and detection method
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).
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).
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
nonexistent,
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 put off or
within two 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
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 put off or
within two 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
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 put off
or within two 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 transmitted
because the address of
FRESH MASTER and LOSS-
NAY are changed after
sequential operation of
FRESH MASTER and LOSS-
NAY by remote controller.
37
Judgment and action
Same as mentioned in "A7" of the previous
page.