Trane ProSpace PTEG0701GAA Installation, Operation And Maintenance Manual page 35

Table 9. Malfunction Causes and Solutions
Status
After energizing, operation indicator is not
bright and the buzzer does not sound.
Under normal power supply situations, the
operation indicator is not bright after
energizing.
After energizing, the room circuit breakers
immediately trips OFF.
After energizing, the air switch trips OFF.
After energizing, the operation indicator is
bright while there is no display on the remote
controller or the buttons have no action.
Fan motor not operating.
Filter blockage.
Unit is not heating or cooling properly in heat
pump mode or cool pump mode.
Unit is not heating or cooling properly in heat
pump mode or cool pump mode.
Compressor is not operating.
Electric heat elements not energizing.
Electric heat element not energizing.
Protection of temperature limiter.
When turning ON the unit, the heating effect
is poor.
Unit is not heating.
Wrong wire connection or a poor connection.
Wire harness connected to main board has a
poor connection.
Using a universal multi-meter measure the
capacitance of the capacitor in micro farads.
If the measured capacitance is not the same
as rated capacitance the capacitor is
damaged.
Wrong wire connection or a poor connection.
Compressor relay on main board is damaged
or the wire harness of the compressor is
loose.
Compressor capacitor is damaged.
PTAC-SVX004A-EN
Cause
Air Conditioner Cannot Be Started
No power supply or poor connection for power
plug.
Poor connection for wiring terminals.
Electric short.
Improper model selection for the air switch.
Malfunction of remote controller.
Air Conditioner Is Cooling Poorly
Fan motor malfunction.
Filter is blocked.
Capillary malfunction.
Refrigerant is leaking.
Compressor malfunction.
Electric Heater Provides Poor Heating
Heating relay on main board is damaged.
Wiring harness between the main board and
display board is loose.
Air inlet blocked by objects.
Malfunction of temperature limiter. Use a
universal meter to measure the two contact
points of the temperature limiter. If the
resistance value is too large, the temperature
limiter is damaged.
Fuse is burned out.
Fan Motor Does Not Operate
Check the wiring status according to the
circuit diagram.
Check wire harness connection.
Fan capacitor is damaged.
Compressor Does Not Operate
Check the wiring status according to the
wiring diagram.
Ensure the relay is functioning correctly in
cooling/heat pump mode.
Using a universal meter measure the micro-
farad rating of the capacitor if it is not the
same as the rating listed on the capacitor it is
damaged.
T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g a a n n d d R R e e s s o o u u r r c c e e s s
Solution
Check for power failure. If so, wait for power
recovery. If not, check power supply circuit
and ensure the power plug is complete
inserted into wall outlet.
Check the circuit according to the circuit
diagram and properly connect the wires.
Ensure all wiring terminals are tightly
connected.
Ensure the unit is properly grounded. Ensure
the wires inside unit are properly connected.
Check the wiring inside the unit and whether
the insulation layer of the power cord is not
damaged. If so, replace the power cord.
Select the proper air switch.
Replace the remote controller batteries.
Repair or replace the remote controller.
Refer to the table section below, "Fan Motor
Does Not Operate" .
Clean the filter.
Replace the capillary.
Investigate the cause of the leaks and repair.
Add any necessary refrigerant.
Refer to the table section below, "Compressor
Does Not Operate" .
Replace main board.
Check wiring harness connection.
Clean the filter and remove any objects
obstructing the inlet.
Replace the temperature limiter.
Measure resistance across fuse, If fuse is bad,
replace.
Connect the wires according to the wiring
diagram to ensure all wiring terminals are
connected securely.
Ensure wire harness is connected securely.
Replace the fan capacitor.
Connect the wires according to the wiring
diagram to ensure all wiring terminals are
connected securely.
Replace the main board.
Replace the compressor capacitor.
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