Grounding; Check And Test Operation - Toshiba RAS-4M23SAV-E Installation Manual

01_OutdoorInstallation_EN.fm Page 12 Friday, March 23, 2007 4:23 PM

5 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.

6 CHECK AND TEST OPERATION

For R410A, use the leak detector exclusively manufactured for HFC refrigerant (R410A, R134a, etc.)
* The conventional leak detector for HCFC refrigerant (R22, etc.) cannot be used because its sensitivity 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.
CAUTION
• 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.
Miswiring (Mis-piping) Check
Make sure that the wiring and piping for each room have the same alphabetical code (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 the side panel 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.
EN
• Service port cap connection
• Valve stem cap connection
12
Flare nut connections
(Indoor unit)
Flare nut connections
(Outdoor unit)