17 Commissioning
Installation and operation manual
38
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P546222-1B – 2020.10
▪ For details concerning the calculation of additional refrigerant
charge amount, see
"To determine the additional refrigerant
25].
▪ For guidance concerning the input of the additional refrigerant
charge amount and leak detection function see
[2‑20]
Manual additional refrigerant charge.
[2‑20]
Description
0 (default)
Deactivated.
1
Activated.
To stop the manual additional refrigerant
charge operation (when the required additional
refrigerant amount is charged), push BS3. If
this function was not aborted by pushing BS3,
the unit will stop its operation after 30 minutes.
If 30 minutes was not sufficient to add the
needed refrigerant amount, the function can be
reactivated by changing the field setting again.
[2‑35]
Height difference setting.
[2‑35]
Description
0
In case the outdoor unit is installed in the
lowest position (indoor units are installed on a
higher position than outdoor units) and the
height difference between the highest indoor
unit and the outdoor unit exceeds 40 m, the
setting [2‑35] should be changed to 0.
1 (default)
—
[2‑45]
Technical cooling.
[2‑45]
Description
0 (default)
No technical cooling available
1
Technical cooling available
For more information about this setting, refer to the service manual.
[2‑47]
T
e
target temperature during heat recovery operation.
[2‑47]
T
e
target (°C)
0 (default)
Auto
2
6
3
7
4
8
5
9
6
10
7
11
[2‑49]
Height difference setting.
[2‑49]
Description
0 (default)
—
1
In case the outdoor unit is installed in the
highest position (indoor units are installed on a
lower position than outdoor units) and the
height difference between the lowest indoor
unit and the outdoor unit exceeds 50 m, the
setting [2‑49] has to be changed to 1.
16.1.9
To connect the PC configurator to the
outdoor unit
X27A
a
b
c
2
3
4
5
H J
ST
X27A
A1P
a
PC
b
Cable (EKPCCAB*)
c
Outdoor unit main PCB
16.2
Using the leak detection function
16.2.1
About automatic leak detection
The (automatic) leak detection function is not by default activated
and can only start working when the additional refrigerant charge is
inputted into the system's logic (see [2‑14]).
The leak detection operation can be automated. By changing
parameter [2‑85] to chosen value, the interval time or the time till the
next automatic leak detection operation can be chosen. The
parameter [2‑86] defines whether the leak detection operation is
executed one time (within [2‑85] days) or intermittent, respecting an
interval of [2‑85] days.
Availability of the leak detection function feature requires input of the
additional refrigerant charge amount immediately after finishing the
charging. The input must be executed before performing the test
operation.
NOTICE
If a wrong value is input for the additional charged
refrigerant weight, the accuracy of the leak detection
function will decrease.
INFORMATION
▪ The weighed and already recorded amount of
additional refrigerant charge (not the total amount of
refrigerant present in the system) must be entered.
▪ The leak detection function is not available when
Hydrobox units are connected to the system.
▪ When the height difference between indoor units is
≥50/40 m, the leak detection function can not be used.
17
Commissioning
NOTICE
General
commissioning
checklist.
Next
to
the
commissioning instructions in this chapter, a general
commissioning checklist is also available on the Daikin
Business Portal (authentication required).
The general commissioning checklist is complementary to
the instructions in this chapter and can be used as a
guideline and reporting template during the commissioning
and hand-over to the user.
Summary of Contents for REYQ8U7Y1B
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