Mitsubishi Electric LGH-F300RVX-E Handbook page 24

Individual check items
If the system cannot be started/stopped using the remote controller after installation is completed, check the
following items.
[1] PZ-61DR-E or PZ-43SMF-E
No. Problem
1 Some Lossnay units in the
group do not operate.
2 The screen display of the
remote controller changes
by itself. Even if you press
the buttons, the screen re-
turns to the original screen
right away.
3 The ventilation mode can-
not be changed with the
remote controller.
4 Even though the function
settings (No. 37 and/or 38)
of PZ-61DR-E are set to
"1", the indoor temperature
and/or supply air tempera-
ture are not displayed.
(For PZ-61DR-E only)
5 Even though the function
settings (No. 36, 37 and/or
38) of PZ-61DR-E are set
to "1", the outdoor tem-
perature, indoor tempera-
ture and/or supply air tem-
perature are not displayed.
(For PZ-61DR-E only)
6 The indoor, outdoor, and/or
supply air temperature dis-
play of PZ-61DR-E blink.
(For PZ-61DR-E only)
Factor
The power of the Lossnay unit is
not ON.
Faulty connection of the remote
controller transmission cable
The remote controller transmis-
sion cables are not correctly
connected between the terminals
(TM4 [1] [2]) of the Lossnay units
in the group.
The system is operating in the
protective mode (intermittent
operation).
Faulty connection of the remote
controller transmission cable
The group wiring and the group
setting of the system controller do
not match.
When the system controller is
used, the Lossnay unit, which is
set as the main Lossnay (SW5-10
ON), is not set to the address with
the smallest number in the group.
The Lossnay unit is performing
the Night-purge operation.
The signal is input to the Bypass
mode switching input (CN26 [1] [2]).
The Lossnay unit is performing
the Bypass mode ventilation.
The setting of PZ-61DR-E is not
correct.
The indoor, outdoor, and/or supply
air temperature are outside the
measurement range.
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Corrective action
Check the items described in (1) [1].
Check the items described in (1) [2].
Connect the remote controller transmis-
sion cables correctly between the termi-
nals (TM4 [1] [2]) of the Lossnay units in
the group.
For details, see the Lossnay technical
manual.
Check the items described in (1) [2].
Check the group wiring or the group
setting of the system controller.
Set the Lossnay unit, which is set as the
main Lossnay (SW5-10 ON) to the ad-
dress with the smallest number.
(See the Lossnay technical manual.)
The ventilation mode cannot be changed
during the Night-purge operation.
(See the Lossnay technical manual.)
Check the Bypass mode switching input
(CN26 [1] [2]).
(See the Lossnay technical manual.)
The indoor temperature and/or supply air
temperature are not displayed during the
Bypass mode.
Select "Yes" at "Temp. display" menu of
PZ-61DR-E.
For details, see the installation manual of
PZ-61DR-E.
In the following cases, the temperature
display blinks.
Outdoor temperature:
32°F (0°C) or lower, 100.4°F (38°C) or
higher
Indoor and supply air temperature:
46.4°F (8°C) or lower, 100.4°F (38°C) or
higher