15
Troubleshooting
Problem
Potential Cause
Corrective Action
No Display
No Hot Water
Water heater power off
No power available in electric socket
Failure in control circuit or internal wiring
Power on water heater
Check electric socket
Contact local a uthorized dealer
No Display
Overtemperature Water
High temp limit switch open
Power board failure
Contact local authorized dealer
Display
No Hot Water
Heating element or internal wiring failure
Contact local authorized dealer
Leakage in Tube Joint
Unsealed tube joint.
Reinstall pipe using thread seal tape or
ring
Leakage in Jacket
Tank or accessories leakage
Water collector blocked
Condensation pipe distorted or not
downward
Cut off power.
Check if condensation pipe is distorted or
not downward
Contact local authorized dealer
Display "E1"
Black wiring with two-core terminal short
circuit or open circuit
Contact local authorized dealer
Display "E2"
White wiring with two-core terminal short
circuit or open circuit
Contact local a
uthorized dealer
Display "E6"
Red wiring with two-core terminal short
circuit or open circuit
Contact local authorized dealer
Display "E7"
Blue wiring with two-core terminal short
circuit or open circuit
Contact local authorized dealer
Display "H6"
Green wiring with six-core terminal short
circuit or open circuit
Contact local authorized dealer
Display "H7"
Blue wiring with six-core terminal short
circuit or open circuit
Contact local authorized dealer
Display "H8"
Yellow wiring with six-core terminal short
circuit or open circuit
Contact local authorized dealer
Display
"EA/EB/ED/EE"
Heating element failure
Contact local authorized dealer
Display "EO"
PCB failure
Contact local authorized dealer
Abnormal Noise
Interfere among internal components
Compressor not installed horizontally
Contact local authorized dealer
"Reset" button popup,
with indicator light up in
orange, unable to
restore.
Fault in grounding system including both
internal and external area of the heater
Cut off power immediately,
and contact
local authorized dealer
Sound at Runtime
Normal sounds of water heater in mode of efficiency include:
Sound of fan and compressor running;
Sound of refrigerant flowing;
Sound of relay acting.
