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Troubleshooting for Error Code
Display
Title
code
1
Problem in remote room air sensor
2
Problem in refrigerant (inlet side) sensor
6
Problem in refrigerant (outlet side) sensor
8
Problem in water tank sensor
16
Problems in sensors
17
Problem in water-inlet sensor
18
Problem in water-outlet sensor
Problem in Electric heater outlet
19
sensor
10
Water pump Lock
Bad communication between remote
3
controller and unit.
5
Bad communication between Main
PCB assembly(Heater) and Main PCB
assembly(Inverter) of the unit.
53
9
PCB program (EEPROM) fault
14
Problem in flow sensor
Cause of error
• Incorrect connection
between
sensor and PCB(Heater).
• PCB(Heater) fault
• Sensor fault
Fault feedback signal detected
From Indoor water pump (for
30 seconds)
• Incorrect connection
between
sensor and PCB(Heater)
• PCB(Heater) fault
• Sensor fault
• The connector for
transmission is disconnected
• The connecting wires are
misconnected
• The communication line is
broken
• Main PCB assembly(Inverter)
is abnormal
• Main PCB assembly(Heater)
is abnormal
• Electrical or mechanical
damage a the EEPROM
Flow sensor
• Water Pump ON. : If flow
rate is not more than 7 LPM
or not less than 80 LPM,
detect it for 15 seconds.
• Water Pump OFF. : If flow
rate is not less than 7 LPM,
detect it for 15 seconds.
COMMISSIONING
Check point & Normal condition
• Resistance: 10 kΩ at 25
centigrade (unplugged) → for
Remote room air sensor
• Resistance: 5 kΩ at 25
centigrade (unplugged) → for
all sensors EXCEPT remote
room air sensor
• Voltage: 2.5 V DC at 25
centigrade (plugged) (for all
sensors)
• Refer resistance-temperature
table to check in different
temperature
• Water pump defect
• If there is a leak in the water
pipe system
• Wiring defect
• Main PCB(Indoor)/Harness
defect
• Wire connection between
remote controller and Main
PCB assembly(Heater)
should be tight
• Output voltage of PCB
should be 12 V DC
• Wire connection between
remote control panel and
Main PCB assembly(Heater)
should be tight.
• This error can not be
permitted
Flow Sensor
• Display the flow rate value
that received from the indoor
unit. (Range : 7 ~ 80 L/min)
183
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