Current Sensor; Checking Procedures; Repair Procedures - Daikin VRV IV+ Service Manual

3 Components
a
a Spring
b Crankcase heater
4 Disconnect the crankcase heater connector from the main PCB.
5 Cut all tie straps that fix the crankcase heater harness.
6 To install the crankcase
procedures" on page 87.
To install the crankcase heater
1 Install the crankcase heater on the compressor.
2 Attach the spring to fix the crankcase heater.
a
a Spring
b Crankcase heater
3 Route the crankcase heater harness towards the switch box.
4 Connect the crankcase heater connector to the main PCB.
WARNING
When reconnecting a connector to the PCB, do NOT apply
force, as this may damage the connector or connector pins
of the PCB.
5 Fix the crankcase heater harness using new tie straps.
INFORMATION
Replace all cable ties that were cut during removal.
Is the problem solved?
Yes
No
Service manual
88
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
b
heater, see "3.3.2 Repair
b
Action
No further actions required.
Return to the troubleshooting of
the specific error and continue
with the next procedure.
3.4

Current sensor

3.4.1

Checking procedures

To perform an electrical check of the current
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 Locate the current sensor connector on the main PCB, see
"6.2.1 Wiring diagram: Outdoor unit" on
2 Check that pins 1 and 4 on connector X101A are bridged.
Result: If the pins are not bridged, install the bridge.
a
a Connector X101A
3 Check the wiring from pins 2 and 3 of connector X101A to the
current sensor.
4 Measure the resistance between pins 2 and 3 of connector
X101A. The measured value should be between 45 and 50 Ω.
Is the measured resistance
correct?
Yes
No
3.4.2

Repair procedures

To remove a current 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 Disconnect the current sensor connector from the main PCB.
"3.13 Plate
page 146.
Action
Return to the troubleshooting of
the specific error and continue
with the next procedure.
Replace the current sensor, see
"3.4.2 Repair procedures" on
page 88.
"3.13 Plate
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07