Daikin VRV IV+ Service Manual page 242

3 | Components
3.6.2 Repair procedures
To remove the E-bridge assembly
Service manual
242
INFORMATION
If non-return valve d is blocked:
▪
Liquid pressure and also discharge pressure will increase.
▪
Suction pressure will drop
▪
R3T and R7T temperatures will be drastically higher compared to R5T and R5T.
Is the non-return valve d blocked?
Yes
No
Prerequisite: Stop the unit operation via the central controller.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
Prerequisite: Close the stop valves of the refrigerant circuit.
Prerequisite: Recuperate the refrigerant from the refrigerant circuit, see
"4.2.2 Repair procedures" [
1 With a pipe cutter, cut 4 refrigerant pipes as indicated.
a
b
c
d
e
a Expansion valve
b Cut here
Action
Replace the non-return valve d, see
"3.6.2 Repair
Component is OK. Return to the
troubleshooting of the specific error
and continue with the next step.
4
368].
4
procedures" [ 242].
4
"3.15 Plate work" [ 315].
f
g
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05