13
Installation & Owner‘s Manual
The diagnostic codes listed above are the most common. If a diagnostic code not listed above is displayed, contact
residential technical assistance referencing the number on the front of this manual.
NOTE
7.5 Error code shooting table
Table.7-2
Malfunction Description Corrective action
Error of sensor T5L(lower water temperature sensor)
E1
Maybe the connection between sensor and PCB is
broken or sensor has been broken.
Contact a qualified person to service the unit.
Tank and wired controller communication error
E2
The connection between controller and PCB is
broken or PCB has been broken.
Evaporator temperature sensor T3 error
E4
The connection between sensor
and PCB is
broken or sensor has been broken.
Contact a qualified person to service the unit.
Ambient temperature sensor T4 error
E5
The connection between sensor and PCB is
broken or sensor has been broken.
Contact a qualified person to service the unit.
Compressor discharge temperature sensor TP error
E6
The connection between sensor and PCB is
broken or sensor has been broken.
Contact a qualified person to service the unit.
E
8
Some wires have been broken or bad wiring
connection.
Contact a qualified person to service the unit.
If PCB current_induction_circuit check the current
difference between L,N >14mA, system consider it as
"electric leakage error"
Electric leakage error
Compressor suction temperature sensor TH error
E9
The connection between sensor and PCB is
broken or sensor has been broken.
Contact a qualified person to service th
e unit.
E-heater open-circuit protection (IEH(Current difference
E-heater on & e-heater off )<1A)
Maybe the E-heater has been broken or bad wiring
connection after repair.
P2
High discharge temperature protection
Tp>115
℃,
Protection active
Tp<90
℃,
Protection inactive
System blocked, air or water or low
refrigerant(leakage) in system (after repair), water
temperature sensor malfunction, etc.
Contact a qualified person to servic
e the unit.
Compressor overloaded protection (10 secs after
compressor start up), Current checking starts ,
1)only compressor running, if it is >7A , the
compressor will be stopped and protected.
2)Compressor+e-heater opend, if it is >IEH+7,the
compressor will be stopped and protected.
Compressor broken, system blocked,
air or water or too much refrigerant in system (after
repair), water temperature sensor malfun
ction, etc.
℃
When the ambient temp T4 is out of Heat Pump
running range (5
~
43
℃
) Heat Pump will stop, unit will
show LA on the position of clock on display until T4
back to (5
~
43 ).
It is normal, and not necessary to repair.
Display
E1
E2
E4
E5
E6
E8
E9
P8
P2
P4
LA