Gree MULTI18HP230V1A

78
Troubleshooting
Inadequate Cooling or Heating
Abnormal
Cooling or
Heating
Incorrect temperature setting Adjust temperature setting
Insufcient airow
Outdoor unit coil
blockage
1. Clean outdoor coil
2. Check for adequate
airow around unit
Indoor air lter blocked Clean indoor lters
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 ttings are insulated
well, both large and small.
Insufcient refrigerant ow
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 ow
Observe the temperature of
refrigerant lines for proper
ow
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