Test Operation - Toshiba RAS-M10PKVP-E Service Manual

10-5-5. Test operation

Miswiring (Mis-piping) check
1. Turn on the power breaker.
2. Set all the connected indoor units to COOL mode
and check the operation.
• It is unnecessary to set the temperature.
• Miswiring checks cannot be executed when the
outdoor air temperature is 5°C or less.
3. Start the check.
• Perform a cooling operation only for the indoor
unit which is installed in room A, and check that
cool air is being blown out from the indoor unit
in this room.
• If cool air is not being blown out from the indoor
unit in room A, touch the piping used to make
the connections to room B where the indoor
unit is shut down. If it is verifi ed that the piping
is cold to the touch and that refrigerant is
circulating, it means that a mistake has been
made in the connection of the piping and/or
wiring to the indoor units.
Turn off the power breaker, and check the
situation again.
Gas leak check
• Check for gas leaks at all connections of the
indoor unit and outdoor unit.
• For R410A, use the leak detector exclusively
manufactured for R410A refrigerant.
• Flare nut connections (Outdoor unit)
• Valve stem cap connection
• Service port cap connection
Fig. 10-5-17
Test operation
1. When performing the test operation during
the summer months, proceed with the cooling
operation fi rst, and after the room temperature
has dropped, perform the heating operation.
(Heating operation: Remote control temperature
setting of 30°C)
Flare nut connections
(Indoor unit)
– 69 –
• When performing the test operation during
the winter months, proceed with the heating
operation fi rst, and then perform the cooling
operation.
(Cooling operation: Remote control
temperature setting of 17°C )
2. The test operation must be performed without fail
one room at a time for all the rooms concerned,
and the operations for cooling and heating must
each be performed for at least 10 minutes.
• The cooling and heating operations can be
performed using the room temperature sensors
of the indoor units.
Cooling operation: Expose the room
temperature sensor to a hair dryer or other
heating device.
Heating operation: Hold a chilled towel or other
article up against the room temperature sensor.
What is to be explained to the customers
• While referring to the OWNER'S MANUAL
which is provided with the indoor unit, have the
customers actually use the controls on the unit for
themselves, and show them how to operate the
unit correctly.
• Do not select the cooling operation and heating
operation at the same time.
When these indoor units in two or more rooms
are to be operated at the same time, the type of
operation in the room where operation was fi rst
initiated takes precedence.
• When the air conditioner is started up or when
its operation mode is switched, operation will
not be initiated for about 3 minutes. This delay is
designed to protect the main unit, and it is normal
and not indicative of any malfunctioning.
• When the outdoor temperature drops, power
is supplied to the compressor to preheat it as
a way of protecting the compressor. Use the
air conditioner with the circuit breaker left at
the "on" setting. The power consumption level
while the compressor is in the preheat status is
approximately 20 W.
• This outdoor unit uses an electronic expansion
valve. It will make a rattling sound when the power
is turned on and when operation is started up at
a rate of once every one to two months: This is
normal and not indicative of any malfunctioning.
This sound is made when the initial settings for
ensuring that control will be exercised under the
optimum conditions are being established.
• During heating operations, refrigerant will fl ow to
the indoor units which are currently shut down as
well: For this reason, sounds may be heard from
the units which are shut down or the surfaces of
the indoor units may warm up.