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Page40
Version1.0Aug2018
Troubleshooting
Warning!
Foryourownsafety,doNOTtrytorepairtheelectricalwiring,gasandwaterpiping,remotecontrol,burners,vent
connectors,orothersafetydevices.Alwayscontactaqualifiedservicetechnicianifyouhaveanyqueries.
Problem PossibleCauses Solution
Hotwaterflowislowornohotwater
delivery.
1. Hot water heater is not
poweredON.
1. PowerONthehotwaterunit.
2. Water service valve not
completelyopened.
2. Check the service valve and
openitcompletely.
3. Water outlet temperature is
notHOTorflowislow.
3. Increasetheflowatthehot
water outlet. Inadequate
flowwillcausethehotwater
heater burner to turn off
automatically.
4. Waterpipingisfrozen. 4. Allowpipingtothaw.
5. Power is disconnected or
watersupplyisshutoff.
5. a)Reconnectthepowerplug
orcheckthecircuitbreaker.
b) Open the water service
valve.
6. Temperaturesettingofwater
heateristoolow.
6. Increasethewaterheater
temperaturesetting.
7. Water outlet mixing valve
malfunction.
7. Checkandreplacethemixing
valve.
8. Error code display on the
remotecontrol.
8. Refer to “Error Code”
section.Ifrequired,contacta
qualifiedserviceplumber.
9. Waterheaterbuiltinstrainer
iscloggedordirty.
9. Clean the strainer. Refer to
“Cleaning & Maintenance”
section.
10. Water outlet aerator is
cloggedordirty.
10. Cleantheaerator.
11. Scalebuild up at the heat
exchanger.
11. Refer to “Error Code”
section.Ifrequired,contacta
qualifiedserviceplumber.
12. Hot and Cold water lines
connectionsarereversed.
12. Reverse the water line
connections.
Waterisnothotenough. 1. Water heater temperature
settingmaybetoolow.
1. Increasethewaterheater
temperaturesetting.
2. Gas service valve not
completelyopened.
2. Check and open the gas
servicevalvecompletely.
3. Gassupplypressureislow. 3. Contact gas supplier or
contractor to verify gas
meterandgaspipingsize.
Figure 47
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