26
Troubleshooting-3
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Water Quality
Damage to the water heater as a result
of poor water quality is not covered by
the Limited Warranty. To ensure full
warranty coverage, treat or condition
water that exceeds the target levels
provided in this table.
Source: EPA National Secondary Drinking Water
Regulations (40 CFR Part 143.3)
Total Hardness*
: 200 mg/L (12 gpg) or less
Aluminum
: 0.05 to 0.2 mg/L or less
Chloride
: 250 mg/L or less
Copper
: 1 mg/L or less
Iron
: 0.3 mg/L or less
Manganese
: 0.05 mg/L or less
pH
: 6.5 - 8.5
Total Dissolved Solids
: 500 mg/L or less
Zinc
: 5 mg/L or less
Sulfate ion
: 250 mg/L or less
Residual chlorine
: 4 mg/L or less
* Maximum limit suggested by Noritz.
The water appears blue
The bath tub/wash-basin has turned
blue
• Coloration to a blue color may be noticed from small
traces of copper ion contained in the water and fat
(furring). However, there are not problems concerning
health. Coloration of the bath tub/wash-basin can be
prevented by cleaning frequently.
(Continued)
Frequent water discharge from the
drain pipe.
• Condensation forms inside the unit during operation
and is discharged from the drain pipe.
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Check for an Error Code on the Remote Controller
If there is a problem with the unit, a numerical error code will flash on the remote controller.
If this occurs, take appropriate measures as listed below.
When an error code appears, the display and the operation light will
flash together.
Error Code
Cause
Action
Ignition error
Check whether the gas valve is open. Press the power
button to turn the unit off, open a hot water fixture,
and turn the unit back on. If the flashing number
doesn't return the problem is solved.
Flashing
Remote Controller
Check to see if the condensate drain pipe is clogged
or frozen (
p.8)
Contact the installer or Noritz America Technical
Support for assistance.
Clogging of condensate
trap or drain pipe
