Amana MBVC 1600, Руководство по установке

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10
F
AULT
R
ECALL
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.
C
OMFORT
N
ET
™ S
YSTEM
O
VERVIEW
The ComfortNet™ system (or CT™ system) is a system that includes
a ComfortNet™ compatible modular blower and air conditioner or
heat pump with a CTK04 thermostat. Any other system configura-
tions are considered invalid ComfortNet™ systems and must be
connected as a traditional (or legacy) system (see
Electrical Con-
nections - 24 Volt Thermostat Wiring for wiring connections).
A ComfortNet™ heating/air conditioning system differs from a
legacy/traditional system in the manner in which the indoor unit,
outdoor unit and thermostat interact with one another. In a tradi-
tional system, the thermostat sends commands to the indoor and
outdoor units via analog 24 VAC signals. It is a one-way communi-
cation path in that the indoor and outdoor units typically do not
return information to the thermostat.
In a ComfortNet TM system, the indoor unit, outdoor unit, and
thermostat “communicate” digitally with one another
creating a two-way communications path. The thermostat
sends commands to the indoor and outdoor units, and also
requests and receives information from both the indoor and
outdoor units.
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.
A
IRFLOW
C
ONSIDERATION
Airflow demands are managed differently in a fully communicat-
ing system than they are in a legacy 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 calcu-
lates 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. Figure 21 lists the various
ComfortNet™ systems, the operating mode, and airflow demand
source.
T
ROUBLESHOOTING
E
LECTROSTATIC
D
ISCHARGE
(ESD) P
RECAUTIONS
NOTE: Discharge body’s static electricity before touching unit. An
electrostatic discharge can adversely affect electrical components.
Use the following precautions during modular blower installation
and servicing to protect the integrated control module from dam-
age. By putting the modular blower, the control, and the person
at the same electrostatic potential, these steps will help avoid ex-
posing the integrated control module to electrostatic discharge.
This procedure is applicable to both installed and uninstalled (un-
grounded) blowers.
1. Disconnect all power to the blower. Do not touch the
integrated control module or any wire connected to the
control prior to discharging your body’s electrostatic charge
to ground.
2. Firmly touch a clean, unpainted, metal surface of the
modular blower near the control. Any tools held in a
person’s hand during grounding will be discharged.
3. Service integrated control module or connecting wiring
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.
D
IAGNOSTIC
C
HART
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 (ar-
row points to top of display). See following image.
HIGH VOLTAGE!
T
O AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK
,
DISCONNECT ELECTRICAL POWER
BEFORE PERFORMING ANY SERVICE OR MAINTENANCE
.
WARNING
7 Segment
Diagnostic
Display
Figure 20 - Diagnostic Display