Water pressure switch fault
Heating water temp. too high protection
Compressor 1 high current protection
Compressor 2 high current protection
High temp. difference protection(water inlet and outlet)
Cooling coil temp. sensor 1 fault
Cooling coil temp. sensor 2 fault
Low ambient temp. protection
Heat recovery heat ex-changer 1 inlet temp. sensor fault
Heat recovery heat ex-changer 2 inlet temp. sensor fault
Heat recovery heat ex-changer 1 outlet temp. sensor fault
Heat recovery heat ex-changer 2 outlet temp. sensor fault
Communication fault (EEV control panel-PCB)
Suction temp. sensor 3 fault
Suction temp. sensor 4 fault
Outdoor coil temp. sensor 3 fault
Outdoor coil temp. sensor 4 fault
Exhaust temp. sensor 3 fault
Exhaust temp. sensor 4 fault
Cooling coil temp. sensor 3 fault
Cooling coil temp. sensor 4 fault
High exhaust temp. protection 3
High exhaust temp. protection 4
Compressor 3 high current protection
Compressor 4 high current protection
High pressure switch 3 fault
High pressure switch 4 fault
Low pressure switch 3 fault
Low pressure switch 4 fault
Heat recovery heat ex-changer 3 inlet temp. sensor fault
Heat recovery heat ex-changer 4 inlet temp. sensor fault
Heat recovery heat ex-changer 3 outlet temp. sensor fault
Heat recovery heat ex-changer 4 outlet temp. sensor fault
Power supply fault ( 3 phases system, dial switch is 1 phase setting)
9. Adjusting and Initial operation
9.1 Attention
● Within 12 hours after running, please connect the circuit breaker, and make the crankcase
heater be preheated.
● Open the valve of water system, and the valve of assistant tank, inject water into the system,
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