Vaillant V 12-025 HWI Training Manual - page 44
Split Type Installation Manual
44
the high speed. Every half second the following items
will be output in turn: the compressor, the outdoor fan,
the four-way valve and the electrical heater.
3. Input: If the room temperature sensor or the tube
temperature sensor is in short circuit or breaks, the
failure will be indicated and the buzzer will give an
alarm; if the differential of the room temperature and
tube temperature inspected is more than 3 ºC, the
buzzer will give an alarm, but the failure won’t be
indicated; if the rotate speed of PG motor keeps lower
than 200rpm in 5 seconds or there is no feedback
signal, it means that the fan goes wrong and the failure
will be indicated and the buzzer is alarming.
4. The time for self-inspection is about 10 seconds. After
completing the self-inspection, the system will exit from
the operation with the help of the remote controller. If
the system doesn’t receive the signal from the remote
controller or the signal of emergency operation key, it
will indicate the last display mode in self-inspection
operation.
Note!
The characteristic of the buzzer: The buzzer gives
a discontinuous alarm with the sound of “de…
de…” and the alarm is free after the air
conditioner is turned on. Besides, it works well
with faults.
Emergency operation key:
When the remote controller is out of work, you can start
or stop the air conditioner by pressing “Emergency
Operation” key on the indoor unit.
1. In the standby state, the air conditioner immediately
enters the automatic mode by pressing the key and the
timing function is cancelled synchronously. The indoor
fan blows out automatic wind and outdoor air door
sways in the swaying mode and indoor air door runs in
default swaying mode.
2. After turning on with the remote control, press this
emergency key, the air conditioner immediately enters
the standby state and the time setting is cancelled at
one time.
The function of the buzzer:
With the signal of 4KHz, the buzzer will make different
sounds according to the working outputs:
1. Power on: a single sound, buzzing 100ms;
2. Turn off: a single sound, buzzing 100ms;
3. A common warning: a single sound, buzzing 100ms;
4. Enter the self-inspecting and testing operation:
buzzing 100ms. The time for self-inspection is no more
than 10 seconds.
5. The air conditioner will give a response immediately
when receiving t he right signal from the remote
controller, but as for the mode switch order, it will give
the response 5 seconds later. The buzzing means that
the order has been accepted.
Powering -on Reporting function:
A sound “hua” will be heard when the main control
board is powered on, which means that the power has
been provided.
How to deal with the signal from the remote controller:
1. The main control board gives a response at once
when receiving the signal from the infrared remote
controller;
2. After the control board receives the signal from the
infrared remote controller, the sound of “hua” will be
heard at once.
9.2.4 Common Protection functions
Compressor protection function:
1. The compressor is allowed to be started up
immediately when power on for the first time.
2. There should be at least three minutes interval when
the compressor is restarted after stop.
3. There should be three minutes for stopping
protection when changing modes.
4. After starting, the compressor should run for three
minutes at least except changing mode and overheating
protection in heating mode as well as shutting down at
first, and then decides whether shut down the
compressor according to the actual situation.
5. In cooling mode, the system will be operated with
failure if both of the room temperature sensor and the
indoor coil temperature sensor go wrong, the faults
codes aren’t indicated, the room temperature is 25 ºC
and the indoor coil temperature is 15 ºC, which are set
by the controller. The working condition of the
compressor at the moment is: it runs for 20 minutes
firstly and then stops for 5minutes and goes round and
round like this.
1) If the temperature sensor of the indoor coil goes
wrong, the compressor keeps running normally;
9 PCB Explanation