7 Maintenance and service
Installation and operation manual
13
EKVDX32~100A2VEB
VRV system air conditioner
4P555815-1A – 2021.08
INFORMATION
The EKVDX is a pretreatment unit. Therefore, the
temperature setpoints:
▪ are not displayed on the user interface.
▪ can only be modified with field settings (see
22] for the appropriate field settings).
6.2
About operation modes
INFORMATION
Depending on the installed system, some operation modes
will not be available.
▪ If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
▪
Setpoint.
Target temperature for the Cooling, Heating, and Auto
operation modes.
▪
Setback.
A function that keeps the room temperature in a specific
range when the system is turned off (by the user, the schedule
function, or the OFF timer).
For more information, refer to the user interface manual.
6.2.1
Basic operation modes
The indoor unit can operate in various operation modes.
Icon
Operation mode
Cooling.
In this mode, cooling will be activated as
required by the setpoint, or by Setback operation.
Heating
. In this mode, heating will be activated as
required by the setpoint, or by Setback operation.
/
Fan only / Ventilation only.
In this mode, air
circulates without heating or cooling.
Auto.
In Auto mode, the indoor unit automatically
switches between heating and cooling mode, as
required by the setpoint.
6.2.2
Special heating operation modes
Operation
Description
Defrost
(a)
To prevent a loss of heating capacity due to
frost accumulation in the outdoor unit, the
system will automatically switch to defrost
operation.
The supply air fan will stop operation while the
exhaust air fan will resume operation as before
defrost operation started.
The following icon will appear on the home
screen:
The system will resume normal operation after
approximately 6 to 8 minutes.
Operation
Description
Hot start
(a)
The supply air fan will stop operation while the
exhaust air fan will resume operation as before
hot start operation started.
The following icon will appear on the home
screen:
(a)
The operation of the supply and exhaust fans depends on the
VAM field setting 17(27)-5.
6.3
To operate the system
INFORMATION
For setting of the operation mode or other settings, see the
reference guide or operation manual of the user interface.
7
Maintenance and service
7.1
About the refrigerant
CAUTION
See
8] to aknowledge all
related safety instructions.
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
The EKVDX contains either R32 or R410A refrigerant.
The EKVDX has an automatic refrigerant detection function. You do
not need to select the refrigerant.
Refrigerant type
R32
R410A
Global warming potential (GWP)
675
2087.5
NOTICE
Applicable legislation on
fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO
2
equivalent.
Formula to calculate the quantity in CO
2
equivalent
tonnes:
GWP value of the refrigerant × total refrigerant
charge [in kg] / 1000
Please contact your installer for more information.
7.1.1
About R32 leakage safety
NOTICE
Functionality of the safety measures are periodically
automatically checked. In case of malfunction, an error
code will be displayed on the user interface.
NOTICE
The R32 refrigerant leakage sensor is a semiconductor
detector which may incorrectly detect substances other
than R32 refrigerant. Avoid using chemical substances
(e.g. organic solvents, hair spray, paint) in high
concentrations, in the close proximity of the EKVDX
because this may cause misdetection of the R32
refrigerant leakage sensor.
