Test Operation; Pre-Run Checks; Test Run; Failure Diagnosis At The Moment Of First Installation - Daikin altherma ERHQ011BAV3 Installation Manual

15. T
EST OPERATION
DANGER
Never leave the unit unattended during installation or
servicing. When the service panel is removed live parts
can be easily touched by accident..
INFORMATION
Note that during the first running period of the unit,
required power input may be higher than stated on the
nameplate of the unit. This phenomenon originates from
the compressor that needs elapse of a 50 hours run in
period before reaching smooth operation and stable power
consumption.
NOTICE
For applications with benefit kWh rate power supply
The outdoor unit power supply
longer than 2 hours to guarantee optimized startup
condition for compressor. See installation manual of the
indoor unit for more details.
(a) For V3: L, N
For W1: L1, L2, L3, N

15.1. Pre-run checks

Items to check
■
Electrical wiring Is the wiring as mentioned on the wiring diagram?
Inter-unit wiring Make sure no wiring has been forgotten and that
Earth wire there are no missing phases.
■
Is the unit properly earthed?
■
Is the wiring between units connected in series
correct?
■
Are any of the wiring attachment screws loose?
■
Is the insulation resistance at least 1 MΩ?
- Use a 500 V mega-tester when measuring
insulation.
- Do not use a mega-tester for low-voltage circuits.
■
Refrigerant Is the size of the piping appropriate?
piping
■
Is the insulation material for the piping attached
securely?
Are both the liquid and gas pipes insulated?
■
Are the stop valves for both the liquid side and the
gas side open?
■
Extra Did you write down the extra refrigerant and the
refrigerant refrigerant piping length?
■
Be sure to perform a test run.
■
Be sure to fully open the liquid-side and gas-side stop valves. If
you operate the unit with stop valves closed, the compressor will
break down.
■
Never leave the unit unattended with an open front panel during

test run.

■
To protect the compressor, make sure to turn on the power
supply 6 hours before starting operation.
■
During tests never pressurize the applications with a pressure
higher than the maximum allowable pressure (indicated on the
name plate of the unit).
15.2. Test run
Carry out the test run in accordance with the indoor installation
manual to ensure that all functions and parts are working properly.
ERHQ011~016BAV3+W1 + ERLQ011~016CAV3+W1
Outdoor unit for air to water heat pump
4PW57794-1C – 2013.04
(a)
interruption may not be
15.3. Failure diagnosis at the moment of first
installation
■
In case nothing is displayed on the remote controller (the current
set temperature does not display), check for any of the following
abnormalities before you can diagnose possible malfunction
codes.
■ Disconnection or wiring error (between power supply and
outdoor unit, between outdoor unit and indoor units, between
indoor unit and remote controller).
■ The fuse on the outdoor unit PCB may have run out.
■
If the remote controller shows "E3", "E4" or "L8" as an error code,
there is a possibility that either the stop valves are closed, or that
air inlet or air outlet are blocked.
■
If the error code "U2" is displayed on the remote controller, check
for voltage imbalance.
■
If the error code "L4" is displayed on the remote controller, it is
possible that air inlet or air outlet are blocked.
■
For a missing phase in case of W1 units, "E7" or "U2" will be
displayed on the remote controller of the indoor unit.
Operation will be impossible with either one of these
phenomena. If this happens, turn off the power, re-check the
wiring and switch the position of two of the three electrical wires.
16. M
AINTENANCE AND SERVICING

16.1. Service precautions

In order to ensure optimal operation of the unit, a number of checks
and inspections should be carried out on the unit at regular intervals,
preferably yearly.
This maintenance shall be carried out by the installer or service
agent.
DANGER: ELECTRICAL SHOCK
See "2. Safety considerations" on page
NOTICE
Touch a metal part by hand (such as the stop valve) in
order to eliminate static electricity and to protect the PCB
before performing service.
CAUTION
Do not rinse the outdoor unit. This may cause electric
shocks or fire.
DANGER: DO NOT TOUCH PIPING AND INTERNAL
PARTS
See "2. Safety considerations" on page
■
Do not touch live parts for 10 minutes after the power
supply is turned off because of high voltage risk.
■
Make sure that the power supply is turned off before
performing the maintenance work. The heater of the
compressor may operate even in stop mode.
■
Please note that some sections of the electric component box
are extremely hot.
■
Make sure you do not touch a conductive section.
■
After measuring the residual voltage, pull out the outdoor fan
connector.
■
The outdoor fan may rotate due to strong backblow wind,
causing the capacitor to charge. This may result in an electric
shock.
After maintenance, make sure the outdoor fan connector is
connected again. Otherwise, the unit may break down.
2.
2.
Installation manual
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