130
Troubleshooting
Inadequate Cooling or Heating
Abnormal
Cooling or
Heating
Incorrect temperature setting
Adjust temperature setting
Insufficient airflow
Outdoor unit coil
blockage
1. Clean outdoor coil
2. Check for adequate
airflow around unit
Indoor air filter blocked
Clean indoor filters
Low Fan Speed
Set fan speed to high
Low indoor air movement
1. Check fan capacitor
2. Check fan blade
3. Check for damaged
motor
Poor insulation on linesets
Ensure that both linesets and fittings are insulated
well, both large and small.
Insufficient refrigerant flow
Refrigerant circuit has
a leak
Check system for leaks
following procedure
explained in the “Charging”
section of this manual.
Leak between valves inside
compressor
Replace compressor
Internal leaking of 4-way
valve
Replace 4-way valve
Blockage of refrigerant flow
Observe the temperature of
refrigerant lines for proper
flow
Outdoor temperature too high
Check for proper outdoor unit location, check
for proper sizing of unit capacity.
Excessive indoor heating loss
Check for leakage around windows, doors,
poor insulation. Calculate heat loss and check
for proper sizing
Excessive indoor cooling load
Check for leakage around windows, doors,
poor insulation, internal load such as
computers, etc. Calculate heat gain and check
for proper sizing
