17
SYSTEM MALFUNCTION SCREEN
OUTSIDE: 84
_
| FAN: AUTO
71
_
HVAC SERVICE
1---800---555---1212
SYSTEM MALFUNCTION
CALL TECHNICIAON
A07036
Fig. 31 -- System Malfunction Screen
Fan Coil
The code number represents flash code on circuit board of fan coil.
Certain faults will generate a system malfunction message on the
main screen. When this occurs, a technician should proceed to the
Last 10 System Events screen in the Service Menu to determine
which fault has caused the message.
Below is a list of which faults will result in a System Malfunction
event:
Code 37 -- Heater output sensed On when not energized
Code 41 -- Blower Motor Fault (ventilator, humidifier,
dehumidifier, outdoor unit will be turned off)
Code 44 -- Motor Communication Fault (ventilator, humidifier,
dehumidifier, outdoor unit will be turned off)
Code 45 -- Control failure
Furnace
The code number represents flash code on circuit board of furnace.
Code 13 -- Limit Circuit Lockout
Code 14 -- Ignition Lockout
Code 15 -- Blower Motor Lockout (ventilator, humidifier,
dehumidifier, outdoor unit will be turned off)
Code 21 -- Gas Heating Lockout
Code 22 -- Abnormal Flame Proving Signal
Code 23 -- Pressure Switch Did Not Open
Code 24 -- Secondary Voltage Fuse Open
Code 33 -- Limit Circuit Fault AND high heat only is active
Code 41 -- Blower Motor Fault (cooling mode only) (ventilator,
humidifier, dehumidifier, outdoor unit will be turned off)
Code 45 -- Control Circuitry Lockout
NOTE
: For codes 13, 14 and 21, the system will use heat pump
heating exclusively if available. When the error code is cleared or
disappears, furnace heating will resume if still requested.
Service Tool Mode
The --D model of user interface can be used as a service tool on any
Evolution system. Attach the --D model user interface anywhere on
the ABCD wiring (e.g. at the indoor or outdoor unit). When the
user interface powers up, it will ask the user if they wish to enter
service mode. Selecting “Yes” will allow the --D model user
interface to take over as the system controller, putting the regular
system user interface to sleep. The screen on the regular user
interface will display “IN SERVICE MODE”. The --D model user
interface will then learn all equipment and function as the system
controller. While in service mode, the --D model user interface will
not transfer any settings or information to or from the regular user
interface----it only takes over control of the system. After removing
the --D model user interface from the ABCD wiring, the regular
user interface will take over the system after two minutes.
Outdoor Unit
The code number represents flash code on circuit board of outdoor
unit.
Code 25 -- Invalid model plug
Code 45 -- Control Failure
Code 47 -- No 230V at unit
Code 73 -- Contactor shorted
Code 74 -- No high voltage at compressor
Code 76 -- Low stage didn’t start three times
Code 78 -- High stage didn’t start three times
Code 81 -- Thermal lockout in low stage -- 4 hrs.
Code 82 -- Thermal lockout in high stage -- 4 hrs.
Code 83 -- Low Pressure Lockout -- 4 hrs.
Code 84 -- High Pressure Lockout -- 4 hrs.
Code 85 -- Low contactor open
Code 86 -- Low contactor shorted
Code 87 -- High contactor open
User Interface
S
Temp sensor failed, loss of communication with smart sensor,
smart sensor fault. “NO SENSOR DATA” shown
S
Indoor unit communication fault
S
Outdoor unit communication fault
S
Packaged product communication fault
S
NIM communication fault
S
SAM communication fault
S
Possible Frozen Coil
S
High Room Temp Alert, when 100
_
F exists for at least 10
minutes, and removed when less than or equal to 98
_
F exists
S
Low Room Temp Alert, when 38
_
F exists for at least 10
minutes, and removed when greater than or equal to 40
_
F exists
S
High Humidity Alert, when 80% Rh exists for 30 minutes, and
removed when less than or equal to 78% Rh exists
The user can press the right side button to dismiss the notice. The
regular run mode screen will then appear except “SYSTEM
MALFUNCTION” will appear in place of the day/time. If the error
has not disappeared within 24 hours, the above display will return.
If the error code disappears, “SYSTEM MALFUNCTION” will
disappear and the day/time will reappear.
UID
01
--
D
