21
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Configuration
Installer and user reference guide
148
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
21.3.2 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
Information codes:
Code
Description
Unit is not prepared to execute leak detection operation
(refer to requirements to be able to execute leak
detection operation).
Indoor unit is out of temperature range 20~32°C for leak
detection operation.
Outdoor unit is out of temperature range 4~43°C for leak
detection operation.
Too low pressure was noticed during leak detection
operation. Restart leak detection operation.
Indicates an indoor unit which is not compatible with
leak detection functionality is installed.
Result of leak detection operation is informed in [1‑29].
Steps during leak detection:
Display
Steps
Preparation
(a)
Pressure equalisation
Start up
Leak detection operation
Standby
(b)
Leak detection operation is finished
(a)
If the indoor temperature is too low, first the heating operation will start.
(b)
If the indoor temperature is lower than 15°C due to leak detection operation and the
outdoor temperature is lower than 20°C, the heating operation will start to maintain basic
comfort heating level.
