Daikin DV PTC 14 Series, Руководство по установке

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following the discharge process in step 2. Use caution not
to recharge your body with static electricity; (i.e., do not
move or shuffle your feet, do not touch ungrounded objects,
etc.). If you come in contact with an ungrounded object,
repeat step 2 before touching control or wires.
4. Discharge your body to ground before removing a new
control from its container. Follow steps 1 through 3 if
installing the control on a blower. Return any old or new
controls to their containers before touching any ungrounded
object.
17.2 Diagnostic Chart
Refer to the Troubleshooting Chart at the end of this manual
for assistance in determining the source of unit operational
problems. The 7 segment LED display will provide any active
fault codes. An arrow printed next to the display indicates
proper orientation (arrow points to top of display). See Figure
31.
HIGH VOLTAGE!
TO AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRIC SHOCK, DISCONNECT ELECTRICAL POWER
BEFORE PERFORMING ANY SERVICE OR MAINTENANCE.
7 Segment
Diagnostic
Display
Figure 31
17.3 Fault Recall
The integrated control module is equipped with a momentary
push-button switch that can be used to display the last six faults
on the 7 segment LED display. The control must be in Standby
Mode (no thermostat inputs) to use the feature. Depress the
push-button for approximately two seconds and less than five
seconds. The LED display will then display the six most recent
faults beginning with the most recent fault and decrementing to
the least recent fault. The faults may be cleared by depressing
the button for greater than five seconds.
NOTE: Consecutively repeated faults are displayed a maximum
of three times. Example: A clogged return air filter causes the
air handler’s motor to repeatedly enter a limiting condition. The
control will only store this fault the first three consecutive times
the fault occurs.
18 Fully Communicating Daikin System
18.1 Overview
NOTE: For a detailed procedure of thermostat commissioning
process, please visit the Daikin One + website at
http://daikinone.com
The Communicating system is a system that includes a
Communicating compatible air handler and air conditioner or
heat pump with a Daikin Communicating thermostat. Any other
system configurations are considered invalid Communicating
systems and must be connected as a traditional (or non-
communicating) system (see the 24 Volt Thermostat Wiring
- Non-Communicating Thermostat Connections section for
details).
A Communicating heating/air conditioning system differs from
a non-communicating/traditional system in the manner in
which the indoor unit, outdoor unit and thermostat interact with
one another. In a traditional system, the thermostat sends
commands to the indoor and outdoor units via analog 24 VAC
signals. It is a one-way communication path in that the indoor
and outdoor units typically do not return information to the
thermostat.
On the other hand, the indoor unit, outdoor unit, and thermostat
comprising a Communicating system “communicate” digitally
with one another. It is now a two-way communications path.
The thermostat still sends commands to the indoor and
outdoor units. However, the thermostat may also request and
receive information from both the indoor and outdoor units.
This information may be displayed on the Communicating
thermostat. The indoor and outdoor units also interact with
one another. The outdoor unit may send commands to or
request information from the indoor unit. This two-way digital
communications between the thermostat and subsystems
(indoor/outdoor unit) and between subsystems is the key to
unlocking the benefits and features of the Communicating
system.
Two-way digital communications is accomplished using
only two wires. The thermostat and subsystem controls are
powered with 24 VAC Thus, a maximum of 4 wires between the
equipment and thermostat is all that is required to operate the
system.
18.2 Airflow Consideration
Airflow demands are managed differently in a fully
communicating system than they are in a non-communicating
wired system. The system operating mode (as determined by
the thermostat) determines which unit calculates the system
airflow demand. If the indoor unit is responsible for determining
the airflow demand, it calculates the demand and sends it to
the ECM motor. If the outdoor unit or thermostat is responsible
for determining the demand, it calculates the demand and
transmits the demand along with a fan request to the indoor
unit. The indoor unit then sends the demand to the ECM motor.
The following table lists the various Communicating systems,
the operating mode, and airflow demand source.
For example, assume the system is a heat pump matched with
an air handler. With a call for low stage cooling, the heat pump
will calculate the system’s low stage cooling airflow demand.
The heat pump will then send a fan request along with the
low stage cooling airflow demand to the air handler. Once
received, the air handler will send the low stage cooling airflow
demand to the ECM motor. The ECM motor then delivers the
low stage cooling airflow. See the applicable Communicating
air conditioner or heat pump installation manual for the airflow
delivered during cooling or heat pump heating.
In continuous fan mode, the thermostat provides the airflow
demand. Depending on which thermostat has been installed
three or four continuous fan speeds may be available. If the
thermostat provides three speeds (low, medium, high) they
correspond to 25%, 50% and 75%, respectively, of the air
handlers’ maximum airflow capability. If the thermostat provides
four continuous fan speeds then a 100% airflow option is
added. During continuous fan operation, the thermostat sends
a fan request along with the continuous fan demand to the air
handler. The air handler, in turn, sends the demand to the ECM
motor. The ECM motor delivers the requested continuous fan
airflow.