Daikin VRV IV+ Service Manual page 368

4 | Third party components
Problem solved?
To check if the refrigerant field piping is conform with the regulations
4.2.2 Repair procedures
To open the stop valves of the refrigerant circuit
Service manual
368
NOTICE
Make sure to use a recommended bubble test solution from your wholesaler. Do not
use soap water, which may cause cracking of flare nuts (soap water may contain salt,
which absorbs moisture that will freeze when the piping gets cold), and/or lead to
corrosion of flared joints (soap water may contain ammonia which causes a corrosive
effect between the brass flare nut and the copper flare).
Any leaks found in the refrigerant
circuit?
Yes
No
1 Check if the refrigerant field piping is conform with the regulations. Adjust as
needed. See installation manual for field piping specifications.
Is the problem solved?
Yes
No
Prerequisite: Remove the required plate work, see
1 Remove the caps.
a
a Liquid stop valve
b Suction gas stop valve
c High pressure/low pressure gas stop valve
2 Completely open the stop valves by screwing the stop valve screw
counterclockwise.
Action
Replace the leaking part of the
refrigerant circuit, see
4
procedures" [
Return to the troubleshooting of the
specific error and continue with the
next procedure.
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
"3.15 Plate
b c
"4.2.2 Repair
368].
4
work" [ 315].
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05