Grant Aerona3 Series - 8.7 Night Mode

Section 8: OperationPage 46
8.7 Night Mode
If there is a need to reduce the electricity consumption or noise produced
by the compressor, e.g. in night-time operation, it is possible to activate the
night mode function using an external contact, e.g. a timeswitch (with volt free
contacts) connected between terminals 28-29 on the PCB terminal.
To enable these terminals, parameter 5128 must be set to 1. Refer to Table
8-25.
When the night mode function starts, according to the time setting, the
maximum frequency will be decreased to the value selected on parameter
4111 in the ON time by time band setting (refer to Table 8-25). Otherwise it
will operate in normal mode.
Night mode contact
Contact OPEN = Night mode OFF
Contact CLOSE = Night mode ON
28
29
Terminal PCB
Night
mode
Figure 8-24: Night mode
Table 8-25: Night mode parameters
Level
Parameter
Function description
Display and input value
Remarks
Group Code Default Min. Max. Unit
I 51 28
Terminal 28-29 : Night mode
0=disable (Remote controller only)
1=enable
0 0 1 -
Parameter 5128 and
parameter 5130
are synchronized in
same value
I 4 1 11 Maximum frequency of Night mode 80 50 100 5%
For details of how to access the parameter settings, refer to Section 9.3.
Parameter 5128 (night mode) and
parameter 5130 (low tariff are automatically
synchronized to same value.
If parameter 5128 is changed to 1 (enable),
then parameter 5130 will be also changed to 1
(enable).
With parameters 5128 and 5130 both set to
1 (enable), the night mode and low tariff
function will operate independently of each
other.
During night mode with night mode contact
ON, if parameter 5128 is changed to 0, the heat
pump will continue to operate in night mode.
During night mode by the remote controller
button, if parameter 5128 is changed to 1, the
heat pump will follow the signal of ON/OFF by
night mode contact.
NOTE
NOTE