Repair Procedures - Daikin VRV IV+ Service Manual

3 Components
a
a Compressor wire terminals cover
3 Disconnect the Faston connectors from the compressor wire
terminals U, V and W.
INFORMATION
Note the position of the Faston connectors on the
compressor wire terminals to allow correct connection
during installation.
a a
a
a Faston connectors
4 Set the Megger voltage to 500 V DC or 1000 V DC.
5 Measure the insulation resistance between the following
terminals. The measured insulation resistance MUST be
>3 MΩ.
▪ U–ground,
▪ V–ground,
▪ W–ground.
Compressor insulation
measurements are correct?
Yes
No
Service manual
84
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Action
Compressor is OK. Return to
troubleshooting of the specific
error an continue with the next
procedure.
Replace the compressor, see
"3.2.2 Repair procedures" on
page 84.
3.2.2

Repair procedures

To remove the transportation stay
Only for 14~20 HP
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
The transportation stay installed over the compressor leg for
protecting the unit during transport must be removed. Proceed as
shown in the figure and procedure below.
1 Slightly loosen the fixing nut (a).
2 Remove the transportation stay (b) as shown in the figure
below.
3 Tighten the fixing nut (a) again.
2 2
To remove the compressor
Prerequisite: Stop the unit operation (via the user interface, central
controller, operation switch, ...).
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
work" on page 118.
Prerequisite: Remove the compressor insulation.
Prerequisite: Recuperate the refrigerant from the refrigerant circuit,
see "4.2.2 Repair procedures" on
1 If needed, remove any parts to create more space for the
removal of the compressor.
DANGER: RISK OF ELECTROCUTION
Confirm rectifier voltage is below 10 V DC before
proceeding.
2 Remove the cover of the compressor wire terminals.
a
a Compressor wire terminals cover
3 (12.3 N·m) 3 (12.3 N·m)
1 1
a
b
"3.13 Plate
page 136.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07