Mitsubishi Electric GUG-01SL-E Handbook page 29

(2) If the Dx-coil unit fails to operate properly
No. Symptom
1 Air blowing through
the Dx-coil unit can-
not be cooled or
warmed.
Cause
Operation mode of the Dx-coil unit is
set to "Fan."
Target temperature of the Dx-coil unit
is high or low.
Fan speed of the Lossnay unit is set
to "Fan speed 1" or "Fan speed 2."
Lossnay is performing the night-
purge operation.
The outdoor unit is in defrosting
operation.
The outdoor unit is operating in heat-
ing standby mode.
The Lossnay unit is operating in the
protective mode (intermittent opera-
tion). (When outside air is -15°C or
lower)
When operation mode of the Dx-coil
unit is "Heating," an outdoor tem-
perature detected by the outdoor unit
is 19°C or higher.
( Only for GUG-03SL-E with a setting
of SA temp. control)
Temperature control selection of the
Dx-coil unit is wrong.
Water is accumulating in the drain
pan of the Dx-coil unit.
An outdoor unit other than those
connectable to the Dx-coil unit is con-
nected.
Temperature control selection of the
Dx-coil unit is wrong for the connect-
ed Outdoor unit.
Processing capacity of the Dx-coil
unit is not sufficient for a room space.
A fan of the Lossnay unit is not run-
ning.
The air filter or Lossnay core of the
Lossnay unit is clogged.
Refrigerant leakage
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Corrective action
Check the operation mode by Dx-coil unit
remote controller (PZ-01RC).
Check the temperature setting by Dx-coil
unit remote controller (PZ-01RC).
Check the fan speed of the Lossnay unit.
Check the screen display on Lossnay re-
mote controller (PZ-61DR-E) or centralized
controller (AE-200E).
Check the screen display on Dx-coil unit
remote controller (PZ-01RC).
Check the screen display on Dx-coil unit
remote controller (PZ-01RC).
• Check the outdoor temperature.
• When Lossnay remote controller (PZ-
61DR-E) is used, it displays the icon " "
that indicates the protective operation is
in-progress.
Check the outdoor temperature.
Check the setting of the function selec-
tion switch (SW1-7: Selecting of RA temp.
control or SA temp. control) on PCB A of
the Dx-coil unit.
Check the condition of the drain pan.
Check that the model combination of the
outdoor unit and Dx-coil unit is correct.
See the table of "Connectable Lossnay
unit and outdoor unit for each function" in
Chapter 3 (page 5).
Check the model name of the outdoor unit.
Make sure the proper outdoor unit is con-
nected for each temperature control (RA
temp. control, SA temp. control) of the Dx-
coil unit.
See the table of "Connectable Lossnay
unit and outdoor unit for each function" in
Chapter 3 (page 5).
Install an adequate Dx-coil unit.
See the Lossnay service handbook.
Clean the air filter or Lossnay core.
Check the refrigerant piping.