Check And Test Operation - Toshiba RAS-M10GKCVP-E Service Manual

10-6. Grounding
This air conditioner must be grounded without fail.
Grounding is necessary not only to safeguard
against the possibility of receiving an electric shock
but also to absorb both the static, which is generated
by high frequencies and held in the surface of the
outdoor unit, and noise since the air conditioner
incorporates a frequency conversion device (called
an inverter) in the outdoor unit.
If the air conditioner is not grounded, users may
receive an electric shock if they touch the surface of
the outdoor unit and that unit is charged with static.

10-7. Check and Test Operation

For R410A, use the leak detector exclusively
manufactured for HFC refrigerant (R410A,
R134a, etc.)
* The conventional leak detector for HCFC refriger-
ant (R22, etc.) cannot be used because its sensi-
tivity for HFC refrigerant lowers to approx. 1/40 of
that manufactured exclusively for HFC refrigerant.
• Pressure of R410A becomes approx. 1.6 times
that of R22. If installation work has not completely
finished, gas leaks may occur in cases such as
when pressure rises during operation.
• Check the flare nut connections, valve stem cap
connections and service port cap connections for
gas leaks with a leak detector or soap water.
• Flare nut connections (Outdoor unit)
• Valve stem cap connection
• Service port cap connection
Fig. 10-7-1
• Use a circuit breaker of a type that is not tripped by shock waves.
• Incorrect/incomplete wiring will cause electrical fires or smoke.
• Prepare the power source for exclusive use with the air conditioner.
• Proceed as follows when connecting the product to the mains power.
• Connection to fixed wiring:
A switch or circuit breaker which disconnects all poles and has a contact separation of at least 3 mm
must be incorporated into the fixed wiring. Utilize only approved short circuit breakers and switches.
* (A breaker having sensitivity of approximately 0.1 second or less and capacity of approximately 30
mA is usually used.)
Flare nut connections
(Indoor unit)
CAUTION
– 61 –
10-7-1. Miswiring (Mis-piping) Check
Make sure that the wiring and piping for each room
have the same alphabetical code (A, B, C).
Connect and secure the power cord.
Use the power cord/cables with thickness, type, and
protective devices specified in this manual.
Insulate the unused cords (conductors) with PVC
tape.
1. Turn on the electrical power breaker.
2. Open the valve cover and the electric parts cover
of the outdoor unit.
3. Set the indoor unit to COOL mode.
• It is unnecessary to set the temperature.
• Miswiring checks cannot be executed when the
outdoor air temperature is 5°C or less.
4. Start the check.
• Disconnect the miswiring check connector
(color: Red) from the inverter P .C. board.
5. During checks (Check time 3 to 20 minutes).
• When an error described in the table below
occurrs, check that operation stops and an
error code is display on LED.
6. After checks, the check results are displayed on
LED.
• The compressor stops when a miswiring (mis-
piping) error occurrs.
• Confirm the contents of the miswiring
(mis-piping) check by LED indication table.
• Turn off the power breaker.
• Correct miswiring/mis-piping.
• Connect the miswiring check connector.
• Execute the check operation again.
• Automatically return to normal operation when
conditions are normal.
7. Return to normal operation.
• To return to normal operation during check
operation or after a miswiring (mis-piping) error
has been determined, connect the miswiring
check connector.