Compressor; Checking Procedures - Daikin VRV IV+ Service Manual

3 Components
c a
a Screw
b 4‑way valve coil
c 4‑way valve body
2 Install and tighten the screw to fix the 4‑way valve coil.
3 Route the 4‑way valve coil harness towards the appropriate
PCB.
4 Connect the 4‑way valve coil connector to the 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 4‑way valve coil harness using new tie straps.
Is the problem solved?
Yes
No
3.2

Compressor

3.2.1

Checking procedures

INFORMATION
It is recommended to perform the checks in the listed
order.
To perform an auditive check of the compressor
Prerequisite: First perform a power transistor check of the inverter
PCB, see "3.8 Inverter PCB" on
proceed as follows:
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 Open the compressor insulation.
2 Turn ON the unit using the respective circuit breaker.
3 Start the unit operation (via the user interface, operation switch,
central controller, ...).
4 Listen to the compressor when it tries to operate. Judge if a
mechanical lock is present.
INFORMATION
If a mechanical lock is present, also check for the root
cause of impurities in the refrigerant causing mechanical
lock of the compressor.
procedures" on page 133.
Service manual
82
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
b
Action
No further actions required.
Return to the troubleshooting of
the specific error and continue
with the next procedure.
page 99. If power transistor is OK,
"3.13 Plate
See "4.2.1 Checking
A mechanical lock is present
on the compressor?
Yes
No
To perform a mechanical check of the compressor
1 First perform an auditive check of the compressor, see
"3.2.1 Checking procedures" on
INFORMATION
For outdoor units ≥14 HP, the transportation stay for the
compressor should be removed. Otherwise vibration is not
absorbed, which can lead to pipe crack. See
procedures" on page 84.
2 Open the compressor insulation.
3 Check the compressor dampers and piping for any damage.
a
a Damper
INFORMATION
The compressor dampers may look different.
Compressor dampers and
piping are in a good
condition?
Yes
No
To perform an electrical check of the compressor
1 First perform a mechanical check of the compressor, see
"3.2.1 Checking procedures" on
2 [Hz] = [rps] x (number of poles) / 2:
▪ For K-Type Compressor: [Hz] = 3 x [rps]
▪ For G-Type Compressor: [Hz] = 2 x [rps]
3 Open the compressor insulation.
Action
Replace the compressor, see
"3.2.2 Repair procedures" on
page 84.
Perform an mechanical check of
the compressor, see
"3.2.1 Checking procedures" on
page 82.
page 82.
"3.2.2 Repair
a
Action
Perform an electrical check of the
compressor, see "3.2.1 Checking
procedures" on page 82.
Replace the compressor, see
"3.2.2 Repair procedures" on
page 84.
page 82.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07