Repair Procedures; Refrigerant High Pressure Sensor; Checking Procedures - Daikin VRV IV+ Service Manual

3 Components
6 Measure the continuity of the reactor.
Is the continuity measurement
correct?
Yes
No
3.14.2

Repair procedures

To remove the reactor
Prerequisite: Stop the unit operation (via the user interface, central
controller, operation switch, ...).
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see
page 118.
2 Access the switch box, see
c c
c a a c
a Screw
b Faston connector
c Screw
3 Remove the screws or Faston connectors to disconnect the
wires from the reactor.
4 Remove the 4 screws that fix the reactor to the switch box.
5 To install the reactor, see
page 124.
To install the reactor
1 Install the reactor on the correct location in the switch box.
Service manual
124
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Action
Reconnect the wiring to the
reactor.
Return to the troubleshooting of
the specific error and continue
with the next step.
Replace the reactor, see
"3.14.2 Repair procedures" on
page 124.
"3.13 Plate work" on
"3.13 Plate work" on page 118.
c c
a
c b b c
"3.14.2 Repair procedures" on
c c
c a a c
a Screw
b Faston connector
c Screw
2 Install the 4 screws that fix the reactor to the switch box.
3 Connect the wiring to the reactor using the screws or Faston
connectors.
Is the problem solved?
Yes
No
3.15

Refrigerant high pressure sensor

3.15.1

Checking procedures

To perform an electrical check of the refrigerant
high pressure sensor
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.
1 Turn ON the power of the unit.
2 Connect a pressure gauge to the high pressure service port.
Read the pressure.
INFORMATION
When the unit is operating in heating mode, the high
pressure port is the gas service port. When the unit is
operating in cooling (defrost) mode, the high pressure port
is the liquid service port.
3 Using the graphic below, determine the expected sensor output
voltage based on the pressure measured in the previous step.
c c
a
c b b c
Action
No further actions required.
Return to the troubleshooting of
the specific error and continue
with the next procedure.
"3.13 Plate
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07