Toshiba RAS-M10PKVP-E Service Manual page 90

10-4-8. Check and Test Operation
For R410A, use the leak detector exclusively manu-
factured 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.
• 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.
• Service port cap
connection
• Valve stem cap
connection
Fig. 10-4-17
• 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.
• This product can be connected to the mains.
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 incorporate in the fixed wiring.
An approved short circuit breaker or switches
must be used.
∗ (A breaker having a sensitivity of approxi-
mately 0.1 second or less and a capacity of
approximately 30 mA is usually used.)
Flare nut connections
(Indoor unit)
Flare nut connections
(Outdoor unit)
– 90 –
10-4-9. Miswiring (Mispiping) Check
Make sure that the wiring and piping for each room
have the same alphabetical codes (A, B, C, D).
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.