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Technical Information
Replace the high
pressure switch
NO
Check if the high
pressure switch
works normally
YES
2 FLOW CHART OF TROUBLESHOOTING
2.1 Troubleshooting Flow Chart of Main Control Malfunction
E1 High Pressure Protection
Operate the unit in normal
ambient temperature range
specified in user's manual
YES
NO
E1 protection
Check if the system high
pressure is higher than
4.2Mpa (609 psig)
Check if the liquid valve
and gas valve of outdoor
unit open completely
Check if the wiring of
high pressure switch is
corrected
Replace the
outdoor mainboard
NO
Check if the air outlet
of outdoor fan motor or
indoor fan motor is normal
YES
Check if the indoor
and outdoor operating
ambient temperature is
within normal range
Clear the obstacle at indoor and
outdoor air outlet or air return
port to ensure smooth air outlet
Completely open the
liquid valve and gas valve
of the outdoor unit
YES
Reconnect wire
according to the
circuit diagram
NO
NO
Summary of Contents for AC Pro C Series
Page 90: ...Technical Information...
