12 Troubleshooting
Installer reference guide
73
EWAQ+0 EK(2)CB
EKMB9W1
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P492901-1 – 2017.06
Error code
Detailed error
code
Description
H3
00
OU: Malfunction of high
pressure switch (HPS) or low
pressure switch (LPS)
Please contact your dealer.
H7
00
OU: Malfunction of position
detection sensor.
Please contact your dealer.
H9
00
OU: Malfunction of outdoor
air thermistor.
Please contact your dealer.
F3
00
OU: Malfunction of discharge
pipe temperature.
Please contact your dealer.
JA
00
OU: Malfunction of high
pressure sensor.
Please contact your dealer.
J1
00
OU: Pressure sensor problem
Please contact your dealer.
J3
00
OU: Malfunction of discharge
pipe thermistor.
Please contact your dealer.
J5
00
OU: Suction pipe temperature
sensor problem
Please contact your dealer.
J6
00
OU: Malfunction of heat
exchanger thermistor.
Please contact your dealer.
J7
00
OU: Malfunction of heat
exchanger thermistor.
Please contact your dealer.
J8
00
OU: Malfunction of outdoor
liquid thermistor.
Please contact your dealer.
L1
00
OU: PCB defect.
Power reset required.
Please contact your dealer.
L5
00
OU: Inverter instantaneous
overcurrent (DC).
Please contact your dealer.
L8
00
OU: Electrical box temperature
rise problem.
Please contact your dealer.
L9
00
OU: Compressor startup defect.
Please contact your dealer.
U0
00
OU: Shortage of refrigerant.
Please contact your dealer.
Error code
Detailed error
code
Description
U2
00
OU: Defect of power supply
voltage.
Please contact your dealer.
UA
00
OU: Indoor/outdoor combination
problem.
Power reset required.
Hydro part
Error code
Detailed error
code
Description
7H
01
Water flow problem.
Auto restart.
7H
05
Water flow problem during
heating/sampling, or after failed
deblocking routine.
Manual reset.
Check the space heating/cooling
circuit, or replace the water
pump.
7H
06
Water flow problem during
cooling/defrost.
Manual reset.
Check the plate heat exchanger.
7H
07
Water flow problem.
Pump deblocking active
80
00
Returning water temperature
sensor problem.
Please contact your dealer.
81
00
Leaving water temperature
sensor problem.
Please contact your dealer.
89
01
Heat exchanger frozen.
89
02
Heat exchanger frozen.
89
03
Heat exchanger frozen.
8H
00
Abnormal increase outlet
water temperature.
A1
00
Zero cross detection problem.
Power reset required.
Please contact your dealer.
A1
01
EEPROM reading error.