Service manual

25
30AW
Electrical connections
4
4.1.4 Silent/night mode
4.1.5 Stop Unit or Defrosting signals
4.1.6 External temperature probe
Silent/night mode is a system setting to limit maximum AQUASNAP
noise level.
Noise level is reduced limiting maximum compressor frequency.
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reduced of 3dBA
1. Congure code 5 through 33AW-CS1 interface or through DST (2 for
Silent/night mode active).
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3. Select Silent/night mode on scheduling
This feature is available using 33AW-CS1 interface dry contact to
frequency reduction mode (PINS 13-14).
There are several signals available on the terminal strip to indicate
particular conditions or the stop of the external unit.
The available signals are:
- Defrosting: When operating in Heating mode, depending on the
external environmental conditions, the unit could perform
defrosting cycles to clean the external battery of any ice formations.
Under these conditions, it is not possible to guarantee the reque-
sted temperature output water temperature, which could reduce
general comfort. (PINS: 4-N or 11-N, NUI CODE: 106 or 108)
- Alarm: Indicates an alarm condition that stops the compressor.
(PINS: 5-N or 11-N, NUI CODE: 147 or108)
If the positioning of the external unit could induce a non-representative
reading of the external temperature by the probe positioned on the
machine, an additional temperature probe can be provided (NTC 2 wire,
Units without an integrated pump allow driving an external one.
With the contact closed, the unit will operate with a maximum
frequency lower than the standard one, otherwise it will operate in
standard mode.
Short-Cut to Frequency reduction Mode
Press the active key among Hold ( ) key for 10 seconds to make Night
mode active and can de-activate the Night mode by pressing the Hold
(
) key again for 10 seconds. When Frequency reduction / Night /
Silence mode is active, NUI will display the (
) Icon. If FR mode is active,
this will always override the selection done in program schedule.
- Ambient Temperature Reached: If suitably programmed using the
User Comfort Interface, and operating with this interface, a signal
is provided that indicates that the ambient temperature has been
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CODE: 147)
Several outputs are used for more than one condition. It is possible to
congure these outputs through the User Comfort Interface installation
menu (refer to the 33AW-CS1 manual).
Refer to the tables of next page and gures on paragraph 4.1 for the
correct pin-outs and use of the signals.
3k @ 25°C, Carrier code: 33AW-RAS01) remote. Connect the terminals
of the probe between PINS 23 and 24 of the terminal strip.
4.1.7 External water circulator for 30AWH__X and 30AWH__NX units
4.1.8 Additional Water pump (PINS 12-N)
The signal is supplied between PINS 16 and N of the terminal strip (PINS
1 and 4 for the NX version).
It is managed in the following way:
If OAT > temperature set in nui code 148
The additional water pump activation depending by the nui code 156
1. ON/ OFF depending on the outdoor unit water pump logic, in case
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2. ON/ OFF depending on the outdoor unit water pump logic, in case
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If OAT < temperature set in nui code 148
The additional water pump activation depending by the nui code 157
(0. always ON, 1. always OFF or 2. ON/OFF depending by EHS).
SM_30AW.indd 25 14-03-2011 14:42:09