Error Codes: Overview - Daikin EGSQH10S18AA9W Installer's Reference Manual

12 Troubleshooting
12.4.1

Error codes: Overview

Error codes of the unit
Error code Detailed error
code
E1 00
E3 00
E5 00
E7 62
E9 00
H0 01
H3 00
H9 00
F3 00
J1 00
JA 00
J3 00
J6 00
J7 12
J8 07
L3 00
Installer reference guide
64
Description
OU: PCB defect.
Power reset required.
Please contact your dealer.
OU: Actuation of high pressure
switch (HPS).
Please contact your dealer.
OU: Overheat of inverter
compressor motor.
Please contact your dealer.
Brine flow Abnormality
Please contact your dealer.
Expansion valve abnormality.
Please contact your dealer.
Brine flow switch malfunction
Please contact your dealer.
OU: Malfunction of high
pressure switch (HPS)
Please contact your dealer.
OU: Malfunction of outdoor
air thermistor.
Please contact your dealer.
OU: Malfunction of discharge
pipe temperature.
Please contact your dealer.
High pressure sensor
abnormality.
Please contact your dealer.
OU: Malfunction of high
pressure sensor.
Please contact your dealer.
OU: Malfunction of discharge
pipe thermistor.
Please contact your dealer.
OU: Malfunction of heat
exchanger thermistor.
Please contact your dealer.
Brine inlet thermistor
abnormality
Please contact your dealer.
Brine outlet thermistor
abnormality
Please contact your dealer.
OU: Electrical box temperature
rise problem.
Please contact your dealer.
Error code Detailed error
code
L4 00
L5 00
P4 00
U0 02
U2 00
U4 00
A1 00
AA 01
UA 00
7H 01
89 01
8H 00
8F 00
C0 00
U3 00
81 00
Daikin Altherma ground source heat pump
Description
OU: Malfunction of inverter
radiating fin temperature rise.
Please contact your dealer.
OU: Inverter instantaneous
overcurrent (DC).
Please contact your dealer.
OU: Malfunction of radiating
fin temperature sensor.
Please contact your dealer.
Refrigerant shortage
Please contact your dealer.
OU: Defect of power supply
voltage.
Please contact your dealer.
Indoor/outdoor unit
communication problem.
Zero cross detection problem.
Power reset required.
Please contact your dealer.
Backup heater overheated.
Power reset required.
Please contact your dealer.
Indoor unit, outdoor unit
matching problem.
Power reset required.
Water flow problem.
Heat exchanger frozen.
Abnormal increase outlet
water temperature.
Abnormal increase outlet
water temperature (DHW).
Flow sensor/switch malfunction.
Please contact your dealer.
Under floor heating screed
dryout function not completed
correctly.
Leaving water temperature
sensor problem.
Please contact your dealer.
EGSQH10S18AA9W
4P351748-1D – 2016.02