16
Y
Y
Y
Y
Y
English
L-2347K Operation
Quick SMXir Troubleshooting Guide
Problem: SMXir Display Not On
Possible Solution:
1. Turn circuit breaker on
2. Check CXP cable and connections
3. Replace keypad/display
4. Replace Power/Logic board
Problem: Erratic Temperature Display
Possible Solution:
1. Perform a Factory Memory Reset
2. Check temperature sensor, cable and connection
3. Ensure the temperature sensor is installed properly
4. Calibrate temperature
5. Replace Power/Logic board
Problem: Erratic system operation
Possible Solution:
1. Perform a Factory Memory Reset
2. Check CXP cable and connections
3. Check temperature sensor, cable and connection
4. Replace keypad/display
5. Replace Power/Logic board
Warning
The Power/Logic board operates at 115VAC or 230VAC.
Make sure the power is off before removing the cover of
the Power/Logic box.
Contact an authorized servicing dealer if the problem
continues, or for replacement parts.
Troubleshooting
Symptom:
Unit does not operate at all
Suggested Solutions:
1. Check the switch to make sure it is set to the desired
function.
2. Check the temp. setpoint to make sure it is sufficient for
the unit to run.
3. Make sure that the generator is running, or shore power is
connected.
4. Ensure the unit’s circuit breaker is ON, and not tripped.
Symptom:
Unit doesn’t make cold air
Suggested Solutions:
1. Check the temp. setpoint to make sure it is sufficient for
the unit to cool.
2. Check the evaporator air filter, clean as needed.
3. Make sure switch is set to COOL.
4. Make sure evaporator blower is running by checking for
airflow from the grill.
5. Make sure that the condenser blower is running by
checking for airflow under the sleeper.
6. Check the condenser coil while under the sleeper. If it is
dirty, clean it.
7. Check the evaporator coil to make sure it is not frozen up.
Sometimes, during cool outside weather, and a low fan
speed, the coil may ice up. Turn the temp. setpoint so that
the compressor cuts off, and turn the fan to maximum
speed. Allow unit to defrost, then resume cooling.
Symptom:
Unit doesn’t make warm air
Suggested Solutions:
1. Make sure switch is set to HEAT.
2. Check the evaporator air filter, clean as needed.
3. Make sure evaporator blower is running by checking for
airflow from the grill.
4. Check the manual reset button on the front of the unit.
Reset by pushing with a pencil or other small device.
Symptom:
Unit doesn’t cool or heat sufficiently
Suggested Solutions:
1. Change the setpoint of the thermostat as required.
2. Check evaporator air filter, clean as needed.
3. Check condenser coil, if it is dirty, then clean it.
4. Close curtains over windows and between the cab and
sleeper.
5. Call a service technician.
Do not
attempt internal repairs
yourself.
