Troubleshooting - A.O. Smith HSE-HNS User Manual

Troubleshooting

Problem
• No display
• No hot water
• No display
• High water
temperature
• Display, no
hot water
• Drip from
pipe joints
• Drip from
enclosure
• Display "E1"
• Display "E2"
• Display "E6"
• Display "E7"
• Display "E3"
• Display "E5"
• Display "EA"
Note: Call Customer Care Centre on 1.800.103.2468
Possible causes
1) No power to heater
2) No power in electric socket
3) Failure in control circuit
or internal wiring
1) High temperature limit
switch open
2) Electrical circuit failure
Heating elements or
internal circuit failure
Unsealed joints
1) Tank or accessories leakage
2) Drain blocked
3) Condensate pipe distorted
or not downward facing
Black wire of two-core terminal
open circuit or short circuit
White wire of two-core terminal
open circuit or short circuit
Red wire of two-core terminal
open circuit or short circuit
Blue wire of two-core terminal
open circuit or short circuit
Ultra High temperature
Low voltage protection
The relay breakdown
Corrective action
1) Switch on power to
2) Check power socket
3) Call Customer Care Centre
1) Switch off power supply
2) Call Customer Care Centre
1) Disconnect power to
2) Check & make condensate
3) Call Customer Care Centre
1) Switch off power supply
2) Call Customer Care Centre
14
Call Customer Care Centre
Reconnect pipes of water
heater and be sure to use
seal tape
heater immediately
pipe downwards
Call Customer Care Centre
Call Customer Care Centre
Call Customer Care Centre
Call Customer Care Centre
Call Customer Care Centre
Call Customer Care Centre
heater