IBC INTERSTAR IWT Series, Инструкция по установке и эксплуатации

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7.0 Troubleshooting
This section includes conditions that may occur in the water heater as well as various solutions.
Symptom Diagnosis Solution
No hot
water at
faucets Boiler does
not operate Ensure boiler power is on.
Ensure the boiler is programed for DHW and the water
temperatures are set properly
Check the tank temperature on the IBC screen, Open or Short +
sensor or wiring issue
Water
Heater
Circulator
does not
operate Follow steps for Boiler does not operate
Ensure the pump relay is closed and suppling power to the pump
Ensure the zone valve is open and the end switch is closed calling
for heat
Check wiring connections at the circulator
Measure voltage at the circulator during a call for heat, should see
120VAC
If power is at the circulator and connections are correct, replace
circulator
Water heater
zone valve
does not
open Follow steps for Boiler does not operate
Check for 24VAC at the zone valve while there is a call for heat, if
correct voltage is available and connections are good, replace the
zone valve.
Tank sensor
open, short,
or mis-wired Ensure the tank sensor is connected to the correct terminals and
the wires are properly attached to the terminal strip and the sensor
is properly attached to the wiring at the tank
Disconnect the sensor wires from the terminal strip and measure
the resistance in Ohms across the 2 sensor wires. Compare this
value to the chart and the actual tank temperature. Repeat this test
for the sensor only and compare the results.
Check/replace the wire from the boiler to the sensor or replace the
sensor
Water at
faucets too
cool DHW
temperature
setting too
low Increase the DHW Tank Set Point temperature
Boiler
Maximum
Supply
Temp.
setting too
low Make sure the Maximum Supply Temp. setting is at least 10°F higher than
the DHW Supply Setpoint PLUS 1/2 of the Supply Diff’l Temp setting.