Daikin VRV III REYQ8PY1B Service Manual page 191

Test Operation
1.2.6 Before operation
1.2.6.1 Service precautions
WARNING: ELECTRIC SHOCK
Caution when performing service to inverter equipment
1. Do not open the electric box cover for 10 minutes after the power supply is turned off.
2. Measure the voltage between terminals on the terminal block for power supply with a tester
3. To prevent damaging the PC-board, touch a noncoated metal part to eliminate static
4. The performing of the service to the inverter equipment must be started after the junction
5. After the service is finished, plug the junction connecter back in. Otherwise the error code
For details refer to the wiring diagram labelled on the back of the electric box cover.
Pay attention to the fan. It is dangerous to inspect the unit while the fan is running. Be sure to
turn off the main switch and to remove the fuses from the control circuit located in the outdoor
unit.
Note: Play it safe!
For protection of the PCB, touch the switch box casing by hand in order to eliminate static
electricity from your body before performing service.
1.2.6.2 Checks before initial start-up
Note: Remark that during the first running period of the unit, required power input may be higher than
stated on the nameplate of the unit. This phenomenon originates from the compressor that
needs elapse of a 50 hours run in period before reaching smooth operation and stable power
consumption.
180
and confirm that the power supply is shut off.
In addition, measure the points, as shown in the figure below, with a tester and confirm that
the voltage of the capacitor in the main circuit is less than 50 V DC.
electricity before pulling out or plugging in connectors.
connectors X1A, X2A, X3A, X4A (X3A and X4A are for 14~16 unit type only) for the fan
motors in the outdoor unit are been pulled out. Be careful not to touch the live parts.
(If a fan rotates due to strong wind, it may store electricity in the capacitor or in the main
circuit and cause electric shock.)
will be displayed on the remote controller and normal operation will not be performed.
Make sure that the circuit breaker on the power supply panel of the installation is switched
off.
Attach the power wire securely.
Introducing power with a missing N-phase or with a mistaken N-phase will break the
equipment.
A2P
A1P
TP1 TP2
A3P
SiBE37-701
E7
Test Operation