Grounding; Test Run - Toshiba RAS-4M27U2AVG-E Installation Manual

Outdoor Unit
Terminal block (Connecting cable)
1(L) 2 1(L)
3
Connecting cable (A unit)
Connecting cable (B unit)
Connecting cable (C unit)
Connecting cable (D unit)
* Connection example (RAS-5M34U2AVG-E)
Connecting cable (C unit)
Connecting cable (D unit)
* Connection example (RAS-4M27U2AVG-E)
Connecting cable (C unit)
* Connection example (RAS-3M26U2AVG-E)
8

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 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.
2 1(L) 2 3
3
POWER
SUPPLY
Screw
Power cord
Screw
Connecting cable (E unit)
Screw
Screw
9

Test run

7 Wiring/Piping Check
CAUTION
Electric current is applied on the
control board. Beware of electric
shock.
1. Detach the front panel of the outdoor unit.
Do not remove the air discharge grille.
2. Turn on the circuit breaker to supply electricity.
In the initial LED display status, D805 is lighted as below.
○ : ON, ● : OFF, ⌾ : Rapid Flashing (5 times/sec.),
D800 D801
● ●
Start running all the indoor units connected to the outdoor unit in the
cooling mode.
(The indoor unit in the room that doesn't operate the cooling mode cannot
be checked.)
3. After 5 minutes, hold down SW801 for at least 5 seconds, and check
that D800 is lighted and D804 light is fl ashing (1 time/sec.).
D800 D801
○ ●
4. Press the SW801 4 times until the LED is displayed as below.
D800 D801
● ●
5. Press SW802 for 1 times. Then D805 light is fl ashing (5 times/sec.).
D800 D801
● ●
6. Hold down SW802 for at least 5 seconds. Then the wiring/piping
check starts automatically. (The LED display is lighted for a moment.)
D800 D801
● ●
• If no problems are detected, the checking operation returns to the
normal operation automatically. The LED is displayed as below.
D800 D801
● ●
7. The below is displayed when the error is detected.
(* Repetition of 3 sec ON / 0.5 sec OFF)
D800 D801
○* ○*
Press the SW801 3 times until the LED is displayed as below, to check
the room judged as error.
D800 D801
● ○
Incorrect wiring/piping can be checked by pressing SW802. The LED is dis-
played as below. Turn off the circuit breaker, then check wiring/piping again.
14
Installation Manual
◇ : Slow Flashing (1 time/sec.)
D802 D803 D804
● ● ●
D802 D803 D804
● ● ◇
D802 D803 D804
○ ● ⌾
D802 D803 D804
○ ● ⌾
D802 D803 D804
○ ● ◇
D802 D803 D804
● ● ●
D802 D803 D804
○* ○* ○*
D802 D803 D804
● ● ●
D805
○
D805
●
D805
●
D805
⌾
D805
○
D805
○
D805
○
D805
⌾