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MCAC-RTSM-2011-12
Midea Combo Type Heat Pump Water Heater Technical Manual
38
2.2.3.9 Error Shooting
If some errors happen, the buzzer will buzz 3 times every other minute and the error indicator will glitter fast.
Press CANCEL for several seconds to stop the buzzer but the light will keep glittering.
ALARM
The light will flash with Alarm
Press CANCEL key to stop the buzzer.
When error happens, though the system could be used in some circumstances, it could not reach the
expected efficiency. Please contact your supplier for help. Error Code Explanation (See table below table)
Display
Malfunction Description
Display
Malfunction Description
E0
Error of sensor T5U
P1
System high pressure protection
≥
2.76MPa active
;
≤
2.07Mpa inactive
E1
Error of sensor T5L
P2
High discharge temp. protection
Tp>115
℃,
Protection active
Tp<90
℃,
Protection inactive
E2
Tank and Wired Controller communication
error
P3
Compressor abnormally stopped protection
The discharge temperature is not so higher than
evaporator temperature after compressor running a
term.
E4
(T3) Condenser output pipe temperature
sensor error
P4
Compressor overloaded protection (10 sec after
compressor startup, Current checking starts ,
1)only compressor running, if it is >7A , the
compressor will be stopped and protected.)
2)Com e-heater opened, if it is >IEH+7,the
compressor will be stopped and protected.)
E5
(T4) Outdoor ambient temperature sensor
error
LA
When the ambient temp is out of Heat Pump running
zone [-7
~
43
℃
],Heat Pump will stop ,then LA
protection code will appear, and ALARM indicator
flashes if the condition maintain more than 20
hours, Need to switch to Enhanced heating Mode.
E6
(Tp) Comp. discharge Sensor error
E9
Compressor suction temperature sensor TH error
E7
Heat Pump system error
If any of P3/P4/P2/P1 continuously appear 3
times within single heating cycle, system will
consider it as
“Heat Pump system error”
Ed
EEPROM chip error
EE
E-heater open-circuit error( IEH(Current difference
E-heater on & e-heater off )<1A)
E8
Electric leakage error
If PCB current induction circuit check the
current difference between L,N >14mA,
system consider it as
” electric leakage error”
EF
Clock chip error
2.3 Running and Operating
2.3.1 Trial Running
1) Before running, please check the following items first:
2) Correct installation of the system;
3) Correct connection of pipeline and wiring;
4) Leakage of the refrigerant pipeline tested;
5) Efficient drainpipe;
6) Complete insulation protection;