To Check The Insulation Resistance Of The Compressor - Daikin VRV IV+ Installer And User Reference Manual

19 | Electrical installation

19.7 To check the insulation resistance of the compressor

Installer and user reference guide
120
NOTICE
When connecting the earth wire, align the wire with the cut out section of the cup
washer. Incomplete earthing may cause electrical shock.
The power supply MUST be clamped to the plastic bracket using field supplied
clamp material to prevent external force being applied to the terminal. The green
and yellow striped wire MUST be used for earthing only.
5~12 HP
a c b d
14~20 HP
a c b d
a Power supply (380~415 V, 3N~ 50 Hz)
b Fuse
c Earth leakage protector
d Earth wire
e Power supply terminal block
f Connect each power wire: RED to L1, WHT to L2, BLK to L3 and BLU to N
g Earth wire (GRN/YLW)
h Tie wrap
i Cup washer
j When connecting the earth wire, it is recommended to perform curling.
Multiple outdoor units
To connect the power supply for multiple outdoor units to each other, ring tongues
have to be used. No bare cable can be used.
In that case, the ring washer that is installed by default should be removed.
Attach both cables to the power supply terminal as indicated below:
L1 L2 L2 N
NOTICE
If, after installation, refrigerant accumulates in the compressor, the insulation
resistance over the poles can drop, but if it is at least 1 MΩ, then the unit will not
break down.
▪
Use a 500 V mega-tester when measuring insulation.
▪
Do NOT use a mega-tester for low voltage circuits.
e
f
g
i
j
h
e
f
g
i
j
h
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10