Maintenance; Maintenance Shedule; Maintenance Procedures For Outdoor Units; To Check The General Status Of The Unit - Daikin VRV IV+ Service Manual

5 Maintenance

5 Maintenance
5.1

Maintenance shedule

To ensure optimal availability of the unit, certain checks and
inspections on the unit and the field wiring have to be carried out at
regular intervals. See the checking procedures in this manual for
inspection of the components mentioned below.
The intervals depend on:
▪ Local legislation,
▪ the conditions at the installation site (presence of dust, sea salt,
harmful gas, oil mist, power supply fluctuation, bumps, vibration
etc.),
▪ how the unit is operated (frequent stop and start, longer operation
hours etc.),
▪ total running hours of the unit,
▪ ambient conditions (high heat and humidity load etc.)
Depending on the above mentioned factors, maintenance may be
required sooner than the mentioned interval here below.
The table below also assumes a unit operation of 10 hours/day and
2500 hours/year.
Normal use of the unit is considered when a unit is not performing
the stop/start cycle (Thermo OFF and then ON) more than 6 times/
hour.
Component Inspection
Electric Motor 1 year
PCB
Heat Exchanger
Sensor, Thermistor
User Interface,
Switches
Drain Pan
Expansion Valve
Solenoid Valve
Air Filter
High Efficiency Filter
Fuse
Crankcase Heater
Components under
pressure
Also, the cleaning of air filters, heat exchangers, fan propellers, drain
pans etc. has to be carried out at regular intervals, see
"5.2 Maintenance procedures for outdoor units" on
5.2 Maintenance procedures for
outdoor units
5.2.1

To check the general status of the unit

Prerequisite: Switch off all the indoor units.
Prerequisite: Stop the unit operation (via the user interface, central
controller, operation switch, ...).
1 Check the rectifier voltage, see
of the inverter PCB has dropped below 10 V DC" on
DANGER: RISK OF ELECTROCUTION
Confirm rectifier voltage is below 10 V DC before
proceeding.
2 Clean the cover plates, see
page 140.
Service manual
140
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Maintenance
20.000 hours
25.000 hours
5 years
5 years
25.000 hours
8 years
20.000 hours
20.000 hours
5 years
1 year
10 years
8 years
In case of corrosion
page 140.
"To check if the rectifier voltage
page 131.
"5.2.2 To clean the cover plates" on
3 Check if any other equipment interferes with the operation of
the outdoor unit (other device exhaust to outdoor unit heat
exchanger, chimney exhaust to outdoor unit, corrosive or
explosive ambient, electrical equipment such as antennas,
GSM towers, etc...). Refer to the installation manual.
4 Make sure that there is sufficient air flow or no air by-pass on
outdoor unit heat exchanger in cooling mode. Refer to
installation manual for required space. Even after outdoor unit
heat exchanger is cleaned by maintenance, if difference
between ambient temperature and air inlet of outdoor unit heat
exchanger is 5K or more, consider mounting an air guide at air
discharge outlet of the outdoor unit.
5 Prior to cleaning, check for oil drips on the bottom plate. If
found, check system for signs of refrigerant shortage, check
possible leaking points and repair when necessary. Refer to
Repair instructions of the component when necessary.
6 Clean the bottom plate.
7 Clean the inside of the unit.
NOTICE
To clean the inside of the unit:
▪ Use water or compressed air, not warmer than 50° C.
▪ Do not use any cleaning agents or chemicals.
▪ Do not use pressurized water.
8 Check the general status inside the cover plates.
9 Check the visual appearance of all the components, including
PCBs. Refer to component check methods if any irregularity is
found.
10 Check the electrical connections. Tighten and secure the
connections when necessary.
11 Check if power supply is in conform with legislation. See
check if the power supply is conform with the regulations" on
page 131.
12 Check and tighten the power supply wiring on the dedicated
terminal.
13 Check insulation on piping and refrigerant branches. Replace or
fix insulation where necessary.
14 Make sure that the water drain works properly and is not
clogged or does not cause any accumulation of water.
15 Clean outdoor unit heat exchanger see
outdoor unit heat exchanger" on
16 Clean outdoor unit fan propellers.
17 Check latest error codes and latest retries, see
the error history" on page 9.
18 Log the maintenance in the log-book.
After outdoor unit and indoor unit (see
for indoor units" on page 142) maintenance is performed, check the
system via Service Checker for normal operation. See
based troubleshooting" on page 73.
5.2.2

To clean the cover plates

1 Clean the cover plates with a wet cloth.
NOTICE
To clean the plate work:
▪ Use water or compressed air, not warmer than 50° C.
▪ Do not use any cleaning agents or chemicals.
▪ Do not use pressurized water.
"To
"5.2.3 To clean the
page 141.
"2.2 To check
"5.3 Maintenance procedures
"2.4 Symptom
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07