Mitsubishi Electric FRESH MASTER GUF-50RD4 Handbook page 12

Signal cables to external devices (Table 1-3)
Check the following checkpoints when outputting the operation monitor and malfunction monitor.
No.
1 Do the signal cables meet regulations? ( Type, diameter )
2 Is the signal cable wired at least 5 cm away from the power supply cable? Wire the signal cable at least 5 cm
3 Are multiple transmission or signal cables wired to the same power cable
duct?
4 Are multiple signal cables wired with multi-core cables?
5 Are the signal cables securely connected to the terminals?
6 Are the signal cables connected to the specified terminal blocks?
Operation monitor: TM3 9, 0
Malfunction monitor: TM3 7, 8
7 Are the output capacities of the operation monitor and malfunction moni-
tor within the ratings?
Output
Operation monitor
Malfunction monitor 240 V AC, 1 A
( Table 2 )
State of machine Remote controller
Does not operate. • Remote control-
ler display does
not appear.
• The power dis-
play "
not appear on
the remote con-
troller. (When
PAR-21MAA is used)
The power display
"
appear on the
remote controller
when power is
supplied to the
system. (When
PAR-F27MEA is
used)
Checkpoint
Maximum rating
240 V AC, 1 A 220 V AC, 100 mA
24 V DC, 1 A 5 V DC, 100 mA
220 V AC, 100 mA
24 V DC, 1 A 5 V DC, 100 mA
Power is not supplied to Fresh
Master, or power that does not follow
specifications is used.
Is there a connection of 3 or more re-
" does
mote controllers, or 16 or more Fresh
Master units?
The remote controller is connected to
TM2
A
transmission cable).
The power of the outdoor unit is not
turned on.
" does not
Power is not supplied to the trans-
mission cable that connects indoor
units and an outdoor unit.
Faulty connection of the M-NET
transmission cable
The number of Fresh Masters, indoor
units, or remote controllers connect-
ed to the transmission cable exceeds
the power supply capacity of the
outdoor unit.
Minimum rating
Cause
, (terminal block for M-NET
B
─ 12 ─
Action
Use specified cables.
away from the power supply cable.
Wire the transmission cables away
from the signal cables.
Use suitable cables to wire the
signal cables so that they are sepa-
rated from one another.
Connect them securely.
Connect them to the specified
terminal blocks.
Use them within the ratings.
Remedy
Check the power supply to Fresh
Master. ( Refer to Table 1-1 )
Check the number of units con-
nected.
Connect the transmission cable
to TM2 1, 2.
ME remote controller is powered by
the outdoor unit. Turn on the power
of the outdoor unit.
Check the settings of the outdoor
unit. See the City Multi databook for
details.
See Table 1-2.
Connect Fresh Masters, indoor units,
or remote controllers within the pow-
er supply capacity of the outdoor unit.
See the City Multi databook for de-
tails.