Toshiba RAS-B10SKVP-E Service Manual page 70

10-4-9. 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
sensitivity for HFC refrigerant lowers to approx. 1/
40.
• Pressure of R410A becomes approx. 1.6 times of
that of R22. If installation work is incompletely
finished, a gas leakage may occur in the cases
such as pressure
rise during operation. Therefore, be sure to test
the piping connections for leaking.
Flare nut connections (Outdoor unit)
Valve stem cap connection
Service port cap connection
Fig. 10-4-15
• Check the flare nut connections, valve stem cap
connections and service port cap connections for
gas leak with a leak detector or soap water.
CAUTION
• Use a circuit breaker of a type that is not
tripped by shock waves.
• If incorrect/incomplete wiring is carried out, it
will cause an electrical fire or smoke.
• Prepare the power supply for exclusive use
with the air conditioner.
Flare nut connections
(Indoor unit)
– 70 –
10-4-10. Miswiring (Mispiping) Check
Make sure that the wiring and piping for each room
have the same alphabetical codes (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 power breaker.
2. Open side panel of the outdoor unit.
3. Set the all indoor units to COOL mode.
• It is unnecessary to set the temperature.
• Miswiring check can not be executed when
outdoor air temperature is 5°C or less.
4. Start the check.
• Disconnect the miswiring check connector
(color : Red) from P .C. board of inverter.
5. During check (Check time 3 to 20 minutes).
• When an error describes in the table below
occurred check operation stops and error code
is displayed on LED.
6. After check, the result of check is displayed on
LED.
• The Comp. stop when miswiring (mispiping)
error occurred.
• Confirm the contents of table below.
• Turn off the power breaker.
• Correct miswiring/mispiping.
• Execute the check operation again.
• Automatically return to the normal operation
when it is normal.
7. Return to normal operation.
• To return to the normal operation during check
operation or after miswiring (mispiping) error is
determined, connect the miswiring check
connector.