Dometic ASCDU15HV 1161, Инструкция по установке и эксплуатации

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27
EN
Universal Air Conditioning Unit Troubleshooting
Problem Possible Reason Possible Solution
The Q3 control is
erratically displaying
the temperature.
A power surge or other event has caused
a processor glitch.
Shut the power to the unit off and then back on.
A power surge or other event has caused
a processor glitch.
Perform the Restore Factory Default Settings routine and
reprogram the control for functions 19 and 23. Refer to
“Programmable Functions, Ranges, and Factory Defaults” on
page 18.
There is a loose connection.
Check the sensor cables and connections. Refer to “Wiring
Diagram” on page 10.
The inside temperature sensor is installed
incorrectly.
Check the wiring. Refer to “Wiring Diagram” on page 10.
The temperature sensor is out of
calibration.
Calibrate the temperature. Refer to “9: Temperature
Calibration” on page 21.
The unity circuit board is malfunctioning.
Replace the unity circuit board. Contact a qualified service
technician to replace and retest the system.
The unit is on however
there is no cooling or
heating.
The wrong mode has been selected.
Check the Programmable Functions. Ensure Programmable
Function 19 is set to “CL” and Programmable Function 23 is
set to “h1”. Refer to “Programmable Functions, Ranges, and
Factory Defaults” on page 18.
There is no heat. The wrong mode has been selected.
Check the Programmable Functions. Ensure Programmable
Function 19 is set to “CL” and Programmable Function 23 is
set to “h1”. Refer to “Programmable Functions, Ranges, and
Factory Defaults” on page 18.
The evaporator coil is
iced.
There is improper airflow through the
evaporator.
Refer to “General System Troubleshooting” on page 25
before reprogramming the Q3 control.
Change Programmable Function 21 to increase the duration
of the Anti-Icing Routine. If the anti-icing cycle does not melt
the ice, switch the air-conditioning unit to Aux Heat/Heat
Mode until the ice melts or use a hair dryer to melt the ice.
The system runs
continuously.
The Air Sensor has been installed in the
improper location.
Verify the Air Sensor location. Ensure the sensor is located
out of direct sunlight and away from open doors or hatches.
“Ar/FL’ is flashing
(Filter Reminder).
The filter needs to be cleaned or
replaced.
Clean or replace the filter. Reset and stop the flashing by
pressing the Fan, Up, and Down buttons simultaneously.
“HI / - -” is flashing.
The high-pressure switch is open (in
cooling) due to improper condenser air
flow.
Verify the proper condenser fan operation. Check for
blockages in the condenser air flow.
“LO / - -” is flashing.
The low-pressure switch is open due to
low Evaporator flow and/or low return-air
temperatures.
Try restarting the air conditioning unit. The installed low-
pressure switch has a ten-minute shutdown time delay that
may be in effect.
The low-pressure switch is open due to
loss of refrigerant.
Check the air conditioning unit for a refrigerant leak. If a leak
is found, call a service technician.
“HI / PS” is flashing
(High Pressure).
The head pressure is above 575 PSI in the
system.
Check the head pressure.
“LO / AC” is flashing
(Low Pressure).
The supply voltage is too low. Verify the power to the unit using a multimeter.
Voltage is improperly calibrated.
Verify that Programmable Function 8 matches the voltage
reading to the unit with a multimeter. Adjust Programmable
Function 8 if necessary. Refer to “Programmable Functions,
Ranges, and Factory Defaults” on page 18.
I Contact an authorized Dometic servicing dealer if the problem continues or for replacement parts.