Mitsubishi Electric LGF-100GX-E Handbook page 44

( 3 ) Troubleshooting 3: The remote controller operation is disabled or irregular.
Checklist for PZ-60DR-E or PZ-41SLB-E ( Table 3-1 )
No. Error
1 Nothing displays on the
liquid crystal display
(LCD).
2 Starts or stops, or the
display changes, by
itself.
3 Displays an error code
that is not in the check
list.
4 Cannot stop the Lossnay
with the remote control-
ler.
(" CENTRAL " is displayed )
5 Cannot switch fan speed
with the remote control-
ler.
6 The ventilation mode
cannot be switched with
the remote controller.
Cause
Transmission cable is connected to the
wrong terminal block.
No Lossnay unit is set to " Main " .
Power is not supplied to Lossnay.
Power that does not follow specifi cations is used.
Transmission cable is not securely connected.
The length of the transmission cable wiring
is longer than specifi ed ( longer than 500 m ) .
Multiple transmission cables are wired using
multi core cables.
Transmission cable and power supply cable
are too close.
LCD characters on the remote controller are
missing.
Poor return action of the remote controller buttons.
Operation of the remote controller has been
prohibited by MELANS.
" INTERLOCK MODE " is set to " oUT " ( exter-
nal input given priority ) .
Remote/local switching ( CN32 ) is set to
" Remote. "
High/Low fan speed switching external input
( CN16 ) is ON.
When PZ-60DR-E is used, " POWER VENT
START " is set to " on " with the function selec-
tion of the remote controller.
When PZ-60DR-E is not used, the function
selection switch for " Power supply/exhaust
when operation starts " ( SW2-3 ) on the
Lossnay circuit board is set to ON.
When PZ-60DR-E is used, the supply fan
speed setting and the exhaust fan speed
setting are set to " L " with the function selec-
tion of the remote controller.
When PZ-60DR-E is not used, the function selec-
tion switches for " Supply fan fi xed at Low speed " ,
and " Exhaust fan fi xed at Low speed " ( SW2-4,
SW2-5 ) on the Lossnay circuit board are set to ON.
The bypass ventilation switching external
input ( CN16 ) is set to ON.
─ 44 ─
Action
Check the transmission cable con-
nection. ( TM4
for the transmis-
,
sion cable from the remote controller )
Turn off the main power supply and
set the Main/Sub selection switch
( SW1 ) ( fi rst unit to " Main " , and sec-
ond and following units to " Sub ") .
Check the power supply to Lossnay.
Check the power supply.
Check the transmission cable
connection.
Check the length of the trans-
mission cable wiring.
Using suitable cables, wire the
transmission cables so that they
are separated from one another.
Wire the transmission cable at least 5
cm away from the power supply cable.
Replace the remote controller.
Replace the remote controller.
Check the setting of the
MELANS.
Check the interlock mode set-
ting. ( Refer to page 19 )
Check the remote/local switch-
ing ( CN32 ) . ( Refer to page 22 )
Check the High/Low fan speed
switching input ( CN16 ) .
( Refer to page 20 and 21 )
Check the setting of " power
supply/exhaust when operation
starts " with the PZ-60DR-E func-
tion selection. ( Refer to page 28 )
Check the function selection
switch ( SW2-3 ) .
( Refer to page 25 )
Check the supply fan speed set-
ting and the exhaust fan speed
setting with the PZ-60DR-E func-
tion selection. ( Refer to page 28 )
Check the function selection
switches ( SW2-4, SW2-5 ) .
( Refer to page 25 )
Check the bypass ventilation
switching input ( CN16 ) .
( Refer to page 22 )