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ESI Outdoor Unit Installation Instruction
05.2018
Manufacturer reserves the right to change at any time for specifications or designs without notice and incurring obligations.
Symptoms
Possible causes
Solution
System does not
start up but the
digital tube shows
normally
•
No 24 VAC signal from indoor unit
or thermostat
Provide 24 VAC signal and make sure
“Y/O/C” connections are correct.
System cannot cool
well
•
Dirty air filter.
•
Blocked outlet of indoor unit
•
The system is in startup control.
•
Outside temperature is too high.
•
Too little refrigerant in the system.
•
Clean or replace the air filter.
•
Eliminate any obstacles.
•
Wait the system to enter PI control.
•
Protection control for the system.
•
Check for leaks and refrigerant charge.
System cannot heat
well
•
Lack of refrigerant
•
No third-party heat source in cold
winter
•
Check refrigerant amount and any leaks
•
Install auxiliary heater and set D/W
output
If the system does not properly operate besides the malfunctions. Check the system based on the
following procedures.
15. Troubleshooting