Selecting Normal And Local Operation; Fault Reset; Others; Failure" Display Lamps - Mitsubishi Electric PFD-P500VM-E Operation Manual

6. Press the 2 [timer/continuous] button and bring up the C "
play
Bringing up the C " " display completes the setting.
Every time the 4 ( ) button of the 4 [timer selection] is pressed
once, it advances (or retrogresses) by 10 minutes.
If the button is pressed continuously, it advances (or retrogresses) continuously.
First set the hour digit and then set the minute digit.
When the ON/OFF timer mode is set, you can run (on-timer) or stop (off-timer)
operation by pressing the b [ON/OFF] button even when there is remaining
time.
Release
Press the 2 [timer/continuous] button and disappear the "

3.6. Selecting Normal and Local Operation

Selecting Local operation
Set the Normal/Local switch c to local.
Start and stop is only possible with the remote controller (remote ON/OFF input
disabled) when Local is selected, and faults occurring during checks are not dis-
played with remote output.

3.7. Fault Reset

Reset when a fault display lamp is lit
Press the ON/OFF button b .
The unit stops and the fault is reset.
* When repairs by the retailer or a specialist technician are complete, ensure
that the unit is safe, and reset. The customer should not engage in repairs.

4. "Failure" Display Lamps

PFD-P250VM-E
The diagram at left shows an example of a fault in
a refrigerant system.
Power
Operating
Check Failure
PFD-P500VM-E
No.1 No.2
Power
Operating
Check
Failure Failure

5. Control of Indoor Unit Inlet or Outlet Temperature

Either of the above methods of temperature control may be selected with this
model.
The method of control is selected with the switch SWC on the Control board in-
side the indoor unit controller shown in the Fig. A.
When the unit is shipped from the factory it is set to outlet temperature control
(SWC set to 'Standard').
Change the method of control by setting SWC on the Control board inside the
controller as follows.
Inlet temperature control: Set to "Option".
Outlet temperature control: Set to "Standard".

6. The smart way to use

Even minimal steps to care for your unit can help make its use far more ef-
fective in terms of air-conditioning effect, electricity charges, etc.
Clean the filter thoroughly
• If the screen of the air filter becomes clogged, the airflow and air-conditioning
effect can be significantly reduced.
Further, if the condition is left unattended, failure can result. It is particularly
important to clean the filter at the beginning of the cooling and heating sea-
sons. (When profuse dust and dirt have accumulated, clean the filter thor-
oughly.)
Caution:
" dis-
• The unit cannot be stopped in the Normal mode. Select the Local op-
eration mode and press the switch on the remote controller. Note that
if the SW 1 - 10 on the indoor unit control board are ON (ie remote ON/
OFF input not used) ON/OFF is also possible from the remote controller
in the Normal mode.
• Remote ON/OFF input and ON/OFF from the central controller (optional)
are disabled in the Local operation mode.
• See the central controller users manual for details of ON/OFF from the
central controller (optional) and input of temperature settings.
• Selecting ON/OFF from the remote controller requires a few seconds.
This is not a fault.
• Following reset after a power failure, the unit begins operation again
" display.
automatically, and 'HO' appears on the MA remote controller display
after an interval of approximately 15 seconds. The MA remote control-
ler cannot be used during this interval. Turn power OFF with the earth
leakage breaker to stop the unit in an emergency.

3.8. Others

CENTRALLY CONTROLLED
CHECK
NOT AVAILABLE
* If both the "Operating" and "Failure" lamps are lit, either a fault has devel-
oped in the unit and it has stopped operating, or it is operating in the emer-
gency mode.
Note the unit number and error code appearing on the panel, and contact
your serviceman.
* A refrigerant system is operating normally if the associated fault display
lamps are extinguished.
[Fig. A] (P.5)
A Control board
C Option: Inlet temperature control
-
Prevent intrusion of heat during air-cooling
• To prevent the intrusion of heat during cooling operation, provide a curtain
or a blind on the window to block out direct sunlight. Also, do not open the
entrance or exit except in cases of dire necessity.
Carry out ventilation sometimes
• Since the air periodically gets dirty in a room that is kept closed for a long
time, ventilation is sometimes necessary. When gas appliances are used
together with the unit, special precautions must be taken. If the "LOSSNAY"
ventilation unit developed by our company is used, you can perform ventila-
tion with less waste. For details on this unit, consult with your dealer.
: Displayed when control is executed by a separately
sold centralized control unit, etc.
: This displays indication when some abnormality oc-
curs in the unit.
: When a button is pressed for any function which
the indoor unit cannot perform, this display flashes
concurrently with the display of that function.
B Control board
D Standard: Outlet temperature control
9