Trouble Shooting - CARNES HBGH Installation, Operation And Maintenance Manual

TROUBLE SHOOTING

SYMPTOM: LCD NOT ON
1. Verify that voltage being supplied to the
humidifier is the same as that listed on the
rating label on the front left hand corner of
cabinet.
2. If humidifier is 3-phase, verify that all legs
have power.
3. If the humidifier has optional internal circuit
breakers, they must be on.
4. Verify LCD is not in dimmed mode by
touching it.
5. Verify that 24VAC is being supplied by
the voltage transformer by taking voltage
reading between TP6 and TP7 (Photo O).
Check the connection at J1 (Photo P).
6. If 24V AC is not present reset the overload
protection (breaker or fuse) located on the
transformer.
7. If 24V AC is present, the circuit board may
be defective.
Photo O
SYMPTOM: WATER DOESN'T FILL INTO CYLINDER
1. Confirm that indicators for the four basic
controls are all lit green, and the humidifier is
switched 'On'.
2. If all four indicators are not green, consult the
"Controls" section of the IOM.
3. If all four indicators are green, and the
'Steam' indicator is green, check the ser-
vice required page for a possible shutdown
scenario.
4. If no service required information is available,
check the Fill Valve indicator (or the Blue
LED on the front). If on, check for 24VAC at
the coil of the fill valve. If 24VAC is present
water should be flowing if water is available.
Be sure all shut off valves ahead of the
humidifier are open.
5. If water is available, check the fill valve
strainer for sediment. Strainer may be
checked by removing brass nut from input of
valve and reaching inside housing and pulling
out strainer.
6. If 24VAC is present and strainer is clean, the
fill valve may be defective.
7. If the High Water Sensor is activated, the fill
valve will not be allowed to open. In this case
the green indicator (and blue LED on front
panel) will be off.
8. Make sure the drain solenoid is not par-
tially open due to blockage, restriction or
malfunction.
30
Photo P