75
Alarm
Code
02
Activation of Protection Device (High Pressure Switch) in Outdoor Unit
●
The alarm code is ashed on the 7-segment display of the outdoor unit.
●
The alarm code is displayed on the wired controller of the indoor unit.
Cause Check Item
Action
(Turn OFF Main Switch)
Event
Activation of
High Pressure
Switch due to
Excessively
Increasing
High Pressure
Measure discharge
pressure.
Check continuity after
decreasing of pressure.
Replace it if faulty.
Failure of
Pressure
Switch
Failure of
High
Pressure
Switch
Measure resistance
with tester.
Repair looseness.
Replace connector.
Contact
Failure
Check connection. Repair connection.
Incorrect
Connection
Calculate heat load.
Reduce heat load or
use a larger unit.
Check for hot air near
ceiling (Heating).
Make circulation better.
Check for short
circuited air (Heating).
Remove
short-circuited air.
Check for other
heat source.
Remove heat source.
Excessively High Temp.
Air to Indoor Unit
Heat Exchanger
Check for clogging of
heat exchanger.
Remove clogging.
Check for dust on
air filter.
Remove dust.
Check for any obstacles
at inlet or outlet of
heat exchanger.
Remove obstacles.
Check service space
is sufficient.
Secure sufficient
service space.
Check fan motor speed.
Cooling: Outdoor Fan
Heating: Indoor Fan
Replace fan motor
if faulty.
Check system operating
temp.
Charge correct
amount of refrigerant.
Overcharged Refrigerant
Check ambient temp.
and pressure.
Recharge refrigerant
after vacuum pumping.
Contamination of
Non-condensable Gas into
Refrigerant System
Check for clogging. Remove clogging.Clogging of Discharge Pipe
Check stop valves.Fully open stop valves.
Liquid line stop valve or
gas line stop valve is
not fully opened.
Insufficient Airflow to
Heat Exchanger
Cooling: O.U. Heat Exchanger
Heating: I.U. Heat Exchanger
TROUBLESHOOTING
To Next Page
Loading...
