Daikin RZAG71L7V1B, Reference Manual

Page: 23 / 40

8 Hand-over to the user
Installer reference guide
23
RZAG71~140L7V1B
Split system air conditioners
4P418663-1 – 2016.02
Error code Possible cause
U2 ▪ There is a voltage imbalance.
▪ There is a missing phase in case of
three-phase power supply units. Note:
Operation will be impossible. Turn OFF
the power, recheck the wiring, and switch
two of the three electrical wires.
U4 or UF The inter-unit branch wiring is not correct.
UA The outdoor and indoor unit are
incompatible.
8 Hand-over to the user
Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:
▪ Make sure that the user has the printed documentation and ask
him/her to keep it for future reference. Inform the user that he can
find the complete documentation on the url as earlier described in
this manual.
▪ Explain the user how to properly operate the system and what to
do in case of problems.
▪ Show the user what to do in relation to maintaining the unit.
9 Maintenance and service
NOTICE
Maintenance must be done by an authorised installer or
service agent.
We recommend to do maintenance at least once a year.
However, applicable legislation might require shorter
maintenance intervals.
NOTICE
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO
2
-equivalent) is used to determine the maintenance
intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
9.1 Overview: Maintenance and
service
This chapter contains information about:
▪ The yearly maintenance of the outdoor unit
9.2 Maintenance safety precautions
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
NOTICE: Risk of electrostatic discharge
Before performing any maintenance or service work, touch
a metal part of the unit in order to eliminate static electricity
and to protect the PCB.
9.3 Checklist for yearly maintenance
of the outdoor unit
Check the following at least once a year:
▪ Outdoor unit heat exchanger.
The heat exchanger of the outdoor unit can get blocked up due to
dust, dirt, leaves, etc. It is recommended to clean the heat
exchanger yearly. A blocked heat exchanger can lead to too low
pressure or too high pressure leading to worse performance.
10 Troubleshooting
10.1 Overview: Troubleshooting
In case of problems:
▪ See "7.5 Error codes when performing a test run" on page 22 .
▪ See the service manual.
Before troubleshooting
Carry out a thorough visual inspection of the unit and look for
obvious defects such as loose connections or defective wiring.
10.2 Precautions when troubleshooting
WARNING
▪ When carrying out an inspection on the switch box of
the unit, always make sure that the unit is disconnected
from the mains. Turn off the respective circuit breaker.
▪ When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER bridge safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
DANGER: RISK OF ELECTROCUTION
WARNING
Prevent hazard due to the inadvertent resetting of the
thermal cut-out: this appliance must NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
DANGER: RISK OF BURNING
11 Disposal
11.1 Overview: Disposal
Typical workflow
Disposing of the system typically consists of the following stages:
1 Pumping down the system.
2 Dismantling the system according to the applicable legislation.
3 Treating the refrigerant, oil and other parts according to the
applicable legislation.
INFORMATION
For more details, see the service manual.