Pump-Down Operation - Toshiba RAS-3M18S3AV-E Manuel D'installation

Outdoor Unit
Gas Leak Inspection
■
Refer to the " Gas Leak Inspection" on page 9.
Test run
■
1. If you perform the test run in summer, start running in the cooling mode fi rst
to decrease the temperature of the room, then run in the heating mode.
(Heating mode: Set the temperature to 30°C.)
• If you perform the test run in winter, start running in the heating mode fi rst
to increase the temperature of the room, then run in the cooling mode.
(Cooling mode: Set the temperature to 17°C.)
2. For the test run, be sure to satisfy the following conditions below:
- Perform the test run for each indoor unit respectively.
- Perform the test run for about 10 minutes in both the cooling mode and
the heating mode.
• You can perform the test run in the cooling/heating mode by utilizing the
thermo sensor of the indoor unit.
Cooling mode: Warm the thermo sensor using an appliance such as a
hair dryer.
Heating mode: Put a cold towel on the thermo sensor.
Instructions for the Customers
■
• Explain to the customers the proper operation procedure and let them
operate the air conditioner along with the supplied instruction manual.
• When multiple indoor units are connected to the outdoor unit, the cooling
mode and the heating mode are not available at the same time.
When multiple indoor units are running at the same time, the operation mode
of the unit which starts running fi rst is applied to the other units.
• When you start running the indoor unit or change the operation mode, the
unit starts running after 3 minutes. This is due to the protection function of
the unit, not a malfunction.
• When the external temperature becomes low, the pre-heating of the
compressor starts to protect it. Keep the circuit breaker on for use.
The electricity consumption during pre-heating is about 30 W.
If the circuit breaker is turned off, the indoor unit may not start running for
about 10 minutes or more.
• Electronic expansion valves are used for the outdoor unit.
When you turn on the power, the outdoor unit starts clattering every 1 or
2 months. This clattering is not a malfunction, but occurs when the unit is
returning to the default setting for optimised control.
• While an indoor unit is running in the heating mode, the outdoor unit supplies
refrigerant to the other indoor units which are not running.
Therefore, noise may come from the other indoor units or the exterior of
them may become warm.
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10

Pump-down Operation

Pump-down Operation (Recovering refrigerant)
■
CAUTION
Since the forcible running for collecting
refrigerant stops automatically after 10
minutes, fi nish collecting refrigerant within
10 minutes.
Electric current is applied on the
control board. Beware of electric
shock.
• The following must be certainly done
during pump down.
• Do not incorporate air into the
refrigeration cycle.
• Close the service valves. Stop the
compressor and remove the refrigerant
pipe.
If the refrigerant pipe is removed when
the compressor is operating and service
valves are opened, the refrigerant cycle
will inhale unwanted matter such as air
and the pressure in the cycle becomes
abnormally elevated. It may cause a
burst or injury.
1. Remove the valve cover screws.
2. Pull the valve cover in the direction of arrow, and remove it.
D800
3. Turn on the circuit breaker to supply electricity.
In the initial LED display status, D805 is lighted as below.
: ON,
 
D800 D801 D802
  
Start running all the indoor units connected to the outdoor unit in the
cooling mode.
The checking procedure cannot be completed if the cooling mode is not
operated in every indoor units.
11
Installation Manual
Valve cover
LED Service switches
D801 D803 D805 SW02
D802 D804 SW01
: OFF, : Rapid Flashing (5 times/sec.),
: Slow Flashing (1 time/sec.)

D803 D804 D805
  
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