Troubleshooting - A.O. Smith HPI-40D User Manual

Troubleshooting

Problem
Display is off
No hot water
Display is off
High water temperature
Display on, no hot water
Leaking from tank
Dripping from pipe joints
Display "E1"
Display "E2"
Display "E4"
Display "E6"
Display "E8"
Display "H6"
Display "H7"
Display "H8"
Possible causes
1. No power to heater
2. No power at electric socket
3. Failure in control circuit or internal
wiring
1. High temperature limit switch
tripped
2. Electrical circuit failure
Heating element or internal circuit
failure
Leaking tank or components
Unsealed joints
White wire with eight-core terminal
short circuit or open circuit
Blue wire with eight-core terminal short
circuit or open circuit
Black wire with eight-core terminal
Short circuit or open circuit
Red wire with eight-core terminal short
circuit or open circuit
Abnormal anode bar wire
Green wire with eight-core terminal
short circuit or open circuit
Blue wire with eight-core terminal short
circuit or open circuit
Yellow wire of eight-core terminal open
circuit or short circuit
Corrective action
1. Switch on power to heater
2. Check power socket
3. Contact local authorized dealer
1. Switch off power supply
2. Contact local authorized dealer
Contact local authorized dealer
1. Switch off power supply
2. Contact local authorized dealer
Reconnect pipes of the water
heater and be sure to use sealant
Contact local authorized dealer
Contact local authorized dealer
Contact local authorized dealer
Contact local authorized dealer
Contact local authorized dealer
Contact local authorized dealer
Contact local authorized dealer
Contact local authorized dealer
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