American Water Heater 318281-000 사용자 설명서

31

No hot water

Storage water heater

No power to auxiliary back-up 
heating element

Check high temperature 
protection and push reset 
button on the heater 
thermostat. (Use caution when 
dealing with electricity.)

Storage water heater 
thermostat

Thermostat defective

Replace

Thermostatic mixing valve

Improper adjustment

Check water temperature at 
house faucet and adjust valve 
setting

Valve defective

Replace.  System must not 
be run without thermostatic 
mixing valve due to scald risk.

Not enough hot water

Storage water heater

Undersized for hot water 
demand load

Replace

Thermostat set too low

Increase set point temperature

Element failure

Replace element

Thermostat failure

Replace thermostat

Element disconnected

Reconnect element and set 
thermostat to 120°F

Check valve

Heat loss due to defective 
check valve in solar pump 
station

Inspect valve and repair or 
replace

Cold water supply dip tube

Missing or defective

Replace dip tube

Collectors

Absorber coating degredation

Replace collector

Collector panel area 
undersized

Increase collector area

Excessive condensation

Inspect and clean weep holes 
and vents at bottom.

Glazing dirty

Clean as required

Leaks

Repair

Orientation

Check orientation.  Face 
collector within 45° of due 
South

Shaded by tree(s) or other 
obstructions

Remove obstacle and shading 
or relocate collectors

Improper tilt

Check tilt for geographic area. 
Ensure tilt is equal to latitude 
plus 15°

Improperly plumbed

Compare with system 
schematic and correct.

Differential Controller

Improper operation (cycling, 
late turn on)

Check sensor placement 
and insulation from ambient 
conditions

Faulty sensor 

  is shown and control 

reads 888.8 instead of 
temperature

Sensor line break. Check the 
line and repair or replace

Faulty sensor 

  is shown and control 

reads -88.8 instead of 
temperature

Short circuit. Check the line 
for breaks, metal contact, 
water exposure and corrosion.