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6.5 Error code shooting table
Display
E0
E1
E2
E4
E5
E6
E8
E9
EE
P1
P2
P3
P4
LA
The diagnostic codes listed above are the most common. If a diagnostic
code not listed above is displayed, contact residential technical assistance
referenceing the number on the front of this manual.
If any of P3/P4/P2 continuously appear 3 times within single heating
cycle,the third failure code do not disappear, system will consider it as heat
pump system error.Contact a quali ed person to service the unit.
Malfunction Description
Error of sensor T5U(upper water temperature sensor)
Error of sensor T5L(lower water temperature sensor)
Tank and Wired Controller communication error
Evaporator temperature sensor T3 error
Ambient temperature sensor T4 error
Compressor discharge temperature sensor TP error
Electric leakage error
If PCB current_induction_circuit check the current
difference between L,N >14mA, system consider it as
"electric leakage error"
Compressor suction temperature sensor TH error
E-heater open-circuit error( IEH(Current difference
E-heater on & e-heater off )<2A)
System high pressure protection
≥ 3.0MPa active ；≤ 2.4Mpa inactive
High discharge temperature protection
Tp>115 ℃， Protection active
Tp<90 ℃， Protection inactive
Compressor abnormally stopped protection
The discharge temperature is not so higher than
evaporator temperature after compressor running a
term.
Compressor overloaded protection (10 secs after
compressor startup, current checking starts ,
1)only compressor running, if it is >7A , the
compressor will be stopped and protected.)
2)Compressor+E-heater running, if it is >IEH+7,the
compressor will be stopped and protected.)
When the ambient temp T4 is out of Heat Pump
running range (-7 ～ 43℃) Heat Pump will stop, unit will
show LA on the position of clock on display until T4
back to (-7 ～ 43 ℃ ).
Only valid for the unit without E-heater.
Unit with E-heater will never show "LA".
Corrective action
Maybe the connection between sensor and PCB has
released or sensor has been broken.
Contact a qualified person to service the unit.
Maybe the connection between sensor and PCB has
released or sensor has been broken.
Contact a qualified person to service the unit.
Maybe the connection between controller and PCB has
released or PCB has been broken.
Maybe the connection between sensor and PCB has
released or sensor has been broken.
Contact a qualified person to service the unit.
Maybe the connection between sensor and PCB has
released or sensor has been broken.
Contact a qualified person to service the unit.
Maybe the connection between sensor and PCB has
released or sensor has been broken.
Contact a qualified person to service the unit.
Maybe some wires have been broken or bad wire
connection.
Contact a qualified person to service the unit.
Maybe the connection between sensor and PCB has
released or sensor has been broken.
Contact a qualified person to service the unit.
Maybe the E-heater has been broken or bad wire
connection after repair.
Maybe because of system blocked, air or water or more
refrigerant in system(after repair), water temperature
sensor malfunction, ect.
Contact a qualified person to service the unit.
Maybe because of system blocked, air or water or less
refrigerant(leakage) in system( after repair), water
temperature sensor malfunction, ect.
Contact a qualified person to service the unit.
Maybe because of compressor broken or bad connection
between PCB and compressor.
Contact a qualified person to service the unit.
Maybe because of compressor broken, system blocked,
air or water or more refrigerant in system(after repair),
water temperature sensor malfunction, ect.
Contact a qualified person to service the unit.
It is normal, and no necessary to repair.
NOTE
17
Table.6-2
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