Mitsubishi Electric LOSSNAY LGH-F300RX5-E Handbook page 49

( 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
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
controller. ("CENTRAL"
is displayed)
5 Cannot stop the Lossnay
with PZ-60DR-E. ("24HR
VENTILATION" is displayed).
6 Cannot switch fan speed
with the remote control-
ler.
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 specifications is used.
 Transmission cable is not securely connected.
 The length of the transmission cable wiring is long-
er than specified (longer than 547 yd. (500 m)).
 Multiple transmission cables are wired with
multi core cables.
 Transmission cable and power supply cable
are too close.
 Liquid crystal display 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."
 24-hour ventilation is set to " on" with the
PZ-60DR-E function selection.
 High/Low/Extra 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 se-
lection 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 fixed at Low speed",
and "Exhaust fan fixed at Low speed" (SW2-4,
SW2-5) on the Lossnay circuit board are set to ON.
 In a mixture of the LGH-F300 to F600 types
and the LGH-F1200 type, the LGH-F1200
type is set to "Main" . (Extra Low fan speed
operation is not available.)
─ 49 ─
Action
 Check the transmission cable con-
nection. (TM4 1, 2 for the transmis-
sion cable from the remote controller)
 Turn off the main power supply and
set the Main/Sub selection switch
(SW1) (first 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 transmis-
sion cable wiring.
 Use suitable cables to wire the
transmission cables so that they
are separated from one another.
 Wire the transmission cable at
least 2 in. (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 setting.
(Refer to page 24)
 Check the remote/local switching
(CN32). (Refer to page 27)
 Check the 24-hour ventilation
setting with the PZ-60DR-E func-
tion selection. (Refer to page 32)
 Check the High/Low/Extra Low
fan speed switching input (CN16).
(Refer to page 25 and 26)
 Check the setting of " power
supply/exhaust when operation
starts" with the PZ-60DR-E func-
tion selection. (Refer to page 33)
 Check the function selection
switch (SW2-3). (Refer to page
30)
 Check the supply fan speed set-
ting and the exhaust fan speed
setting with the PZ-60DR-E func-
tion selection. (Refer to page 33)
 Check the function selection
switches (SW2-4, SW2-5). (Refer
to page 30)
 Set the LGH-F300 to F600 types
to "Main" and the LGH-F1200
type to "Sub" . (Refer to page 31)