4. Service procedures
(2) General Troubleshooting Flow Chart: Diagnosis and Remedy
When you have found a major problem, such as refrigerant not flowing in the system or reduced air circulation, come to this section and find the box listing the problem. Connected to the box are the main causes of the problem and their remedies. To find out which malfunction is happening in your case, check the remote controller for an Alarm Message, and follow the steps in section 3).
4
(A)Cooling
a.Cooling Poor cooling
Refrigerant flow failure
Not enough air circulation
Is setting temp. suitable ?
Is cooling load too heavy ?
Refrigerant shortage
Electronic refrigerant control valve is defective.
Compressor is defective.
Service valves are not fully open.
Air filter
is clogged.
Is fan speed set to LOW ?
Refrigerant tubes between indoor and outdoor units are not insulated.
Change the setting temp.
Review cooling load estimate.
Replace the
Charge refrigerant gas.
Replace the valve.
Replace the compressor.
Open the valves fully.
Clean the filter.
Set the fan speed to either MEDIUM or HIGH.
Insulate wide and narrow tubes separately.
0458_M_I
SM830082
IV - 4
