Specifications

Installation and operation manual
30
RXYQQ8~20T7Y1B
VRV IV System Air Conditioner
4P345099-1 – 2013.04
Mode 2
Mode 2 is used to set field settings of the outdoor unit and system.
 Changing and access the setting in mode 2:
Once mode 2 is selected (push BS1 for more than 5 seconds),
you can select the wanted setting. It is done by pushing BS2.
Accessing the selected setting's value is done by pushing BS3 1
time.
 To quit and return to the initial status, press BS1.
 Changing the value of the selected setting in mode 2:
- Once mode 2 is selected (push BS1 for more than 5
seconds) you can select the wanted setting. It is done by
pushing BS2.
- Accessing the selected setting's value is done by pushing
BS3 1 time.
- Now BS2 is used to select the required value of the selected
setting.
- When the required value is selected, you can define the
change of value by pushing BS3 1 time.
- Press BS3 again to start operation according to the chosen
value.
Example:
Checking the content of parameter [2-18] (to define the high static
pressure setting of the outdoor unit's fan).
[A-B]=C in this case defined as: A=2; B=10; C=the value we want to
know/change
 Make sure the segment indication is as during normal operation
(default situation when shipped from factory).
 Push BS1 for over 5 seconds; result segment display:
Result: mode 2 is accessed.
 Push BS2 18 times; result segment display:
Result: mode 2 setting 18 is addressed.
 Push BS3 1 time; the value which is returned (depending on the
actual field situation), is the status of the setting. In the case of
[2-18], default value is "0", which means the function is not
active.
Result: mode 2 setting 18 is addressed and selected, return
value is the current setting situation.
 To change the value of the setting, push BS2 till the required
value appears on the segment indication. When achieved,
define the setting value by pushing BS3 1 time. To start
operation according to the chosen setting, confirm again by
pushing BS3.
 To leave the monitoring function, push BS1 2 times, you will
return to the default situation when shipped from factory.
13.2.2. Operating the DIP switches
By operating the DIP switches it is possible to:
13.3. Connecting the PC configurator to the outdoor
unit
Connection of the optional PC configurator cable to the outdoor unit
has to be done on A1P. Connect the EKPCCAB* cable to the 5-pin
blue connector X27A.
1 PC
2 Cable (EKPCCAB*)
3 Outdoor unit main PCB
14. Charging refrigerant
14.1. Precautions
 To avoid compressor breakdown. Do not charge the refrigerant
more than the specified amount.
 This outdoor unit is factory charged with refrigerant and
depending on pipe sizes and pipe lengths some systems require
additional charging of refrigerant. See "14.3. Calculating the
additional refrigerant charge" on page 31.
 In case re-charge is required, refer to the nameplate of the unit.
It states the type of refrigerant and necessary amount.
What to do with DIP switch DS1
1
COOL/HEAT selector (refer to the manual of the cool/heat
selector switch)
OFF=not installed=factory setting
2-4
NOT USED
DO NOT CHANGE THE FACTORY SETTING
What to do with DIP switch DS2
1-4
NOT USED
DO NOT CHANGE THE FACTORY SETTING
CAUTION
Works executed on the outdoor unit are best done under
dry weather conditions to avoid water ingress.
NOTICE
 Refrigerant cannot be charged until field wiring has
been completed.
 Refrigerant may only be charged after performing the
leak test and the vacuum drying.
 When charging a system, care shall be taken that its
maximum permissible charge is never exceeded, in
view of the danger of liquid hammer.
 Charging with an unsuitable substance may cause
explosions and accidents, so always ensure that the
appropriate refrigerant R410A is charged.
 Refrigerant containers shall be opened slowly.
 Always use protective gloves and protect your eyes
when charging refrigerant.
 When the refrigerant system is to be opened,
refrigerant must be treated according to the applicable
legislation.
DANGER: Electrical shock
See "2. General safety precautions" on page 2.
X27A
1
2
3
2
345
H JST
X27A
A1P