Daikin REMQ5U7Y1B, Installer And User Reference Manual

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20 | Configuration
Installer and user reference guide
143
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10
E Quick
F Powerful
20.4 Using the leak detection function
20.4.1 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.
20.4.2 To manually perform a leak detection
When the leak detection function was initially not required, but its activation is
wanted at a later moment, input the additional refrigerant charge into the system's
logic.
Executing the leak detection function one time at site can also be done by
following procedure.
1 Push BS2 one time.
2 Push BS2 one more time.
3 Push BS2 5 seconds.
4 Leak detection function will start. To abort leak detection operation, push BS1.
Result: When the manual leak detection is finished, the result is shown on the
outdoor unit 7‑segment display. The indoor units are in locked state (centralised
control symbol). To return to normal state, push BS1.
Display Meaning
No leak detected
Leak detected