Amana MBVC 1600, Руководство по установке

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13
D
IAGNOSTICS
Accessing the modular blower’s diagnostics menu provides ready
access to the last six faults detected by the modular blower. Faults
are stored most recent to least recent. Any consecutively repeated
fault is stored a maximum of three times. Example: A clogged
return air filter causes the modular blower’s motor to repeatedly
enter a limiting condition. The control will only store this fault the
first three
consecutive times the fault occurs.
NOTE: It is highly recommended that the fault history be cleared
when performing maintenance or servicing the modular blower.
N
ETWORK TROUBLESHOOTING
The ComfortNet™ system is a fully communicating system, and
thus, constitutes a network. Occasionally the need to trouble-
shoot the network may arise. The integrated control has some
on-board tools that may be used to troubleshoot the network.
These tools are: red communications LED, green receive (Rx) LED,
and LEARN button.
• Red communications LED – Indicates the status of the
network. The table below indicates the LED status and
the corresponding potential problem.
• Green receive LED – Indicates network traffic. The table
below indicates the LED status and the corresponding
potential problem.
• Learn button – Used to reset the network. Depress the
button for approximately 2 seconds to reset the network.
S
YSTEM
T
ROUBLESHOOTING
NOTE: Refer to the instructions accompanying the CT™ compatible
outdoor AC/HP unit for troubleshooting information.
Refer to the Troubleshooting Chart in the Appendix for a listing of
possible modular blower error codes, possible causes and correc-
tive actions.
Communciations Status LED’s
LED LED Status Indication Possible Causes Corrective Action(s) Notes & Cautions
Off x Normal condition x None x None x None
1 Flash x
Communications
Failure
x
Communications Failure
x
Depress Learn Button
x
Verify that bus BIAS
and TERM dipswitches
are in the ON position.
x
Depress once quickly
for a power-up reset
x Depress and hold for 2
seconds for an out-of-
box reset
Red
Communications
LED
2 Flashes x
Out-of-box reset
x
Control power up
x
Learn button depressed
x
None
x
None
Off x
No power
x Communications error
x
No power to modular
blower
x
Open fuse
x Communications error
x
Check fuses and circuit
breakers; replace/reset
x
Replace blown fuse
x Check for shorts in low
voltage wiring in
modular blower/system
x
Reset network by
depressing learn button
x
Check data 1/ data 2
voltages
x
Turn power OFF prior
to repair.
x
See Network
Troubleshooting
section.
1 Steady
Flash
x No network found x Broken/ disconnected
data wire(s)
x
Modular blower is
installed as a legacy/
traditional system
x Check communications
wiring (data 1/ data 2
wires)
x
Check wire connections
at terminal block
x
Verify modular blower
installation type
(legacy/ traditional or
communicating)
x
Check data 1/ data 2
voltages
x Turn power OFF prior
to repair
x
Verify wires at
terminal blocks are
securely twisted
together prior to
inserting into terminal
block
x
See Network
Troubleshooting
section
Rapid
Flashing
x
Normal network
traffic
x
Control is “talking” on
network as expected
x
None
x
None
Green Receive
LED
On Solid x Data 1/ Data 2 miss-
wire x Data 1 and data 2 wires
reversed at modular
blower, thermostat, or
CT™ compatible
outdoor AC/HP
x
Short between data 1
and data 2 wires
x
Short between data 1 or
data 2 wires and R
(24VAC) or C (24VAC
common)
x Check communications
wiring (data 1/ data 2
wires)
x
Check wire connections
at terminal block
x
Check data 1/ data 2
voltages
x Turn power OFF prior
to repair
x Verify wires at
terminal blocks are
securely twisted
together prior to
inserting into terminal
block
x
See Network
Troubleshooting
section