Herrmidifier Herrtronic 6000 Series - Manual (Page 15)

Herrtronic ® Model 6000
I n s t a l l a t i o n , O p e r a t i o n , & M a i n t e n a n c e M a n u a l
15 www.herrmidifier-hvac.com
Non-Fault Activated Problems:
Problem / Symptom Reason - Correction
24 VAC circuit breaker trips as
soon as power switch is turned
“on”.
Check the wiring at the 24 VAC breaker for a short or loose connection.
Disconnect the contactor coil from the circuit and repeat. If 24 volt breaker doesn’t blow,
replace the contactor.
Replace the main circuit board.
24 VAC circuit breaker trips after
the unit is turned on for about 15
seconds.
Disconnect fill valve from electrical circuit. If circuit breaker doesn’t trip, replace the fill
valve.
Replace the main circuit board
24 VAC Circuit breaker trips when-
ever the drain valve activates
Disconnect drain valve from electrical circuit. If circuit breaker doesn’t trip, replace the drain
valve.
Remove the drain valve and insure that it is clean and free of any obstructing mineral de-
posits.
Replace the main circuit board.
Humidifier turned on but will not
operate. Power lamp is “off”.
Check power supply.
Check circuit breaker.
Check connector J1 on the circuit board and insure that it is plugged into the circuit board
properly and that no wires are loose.
Insure that there is 24 VAC between pole #9 and #11 connector J1. If not, check wiring.
Place jumper between controls terminal strip #1 and #2. If unit operates, check controls set-
tings and wiring (control stat, high limit humidistat, air proving switch.)
Check door interlock.
Unit turned “on”. Contactor pulled
in, but no water is entering the
cylinder.
Check external shutoff valves and open if closed.
Check strainer and fill valve for clogs. Turn adjusting screw (fig. 9, page 10)
Check fill valve coil to determine if it is receiving 24 VAC. If so, replace the valve.
Check for break in wiring.
Excessive arcing in cylinder Check drain valve and insure that when it activates it drains freely. Clean if necessary.
Replace valve if defective.
Check water supply. If it is softened, increase the drain threshold pot, “% adj.” (R18), up to
92%. (See Figure 12)
Use high conductivity settings if water supply is very hard, >750 micromho.
Unit filling slower or at the same rate as the water is boiling, causing over concentration and
foaming. Check restriction in fill line. Adjust the metering fill valve to allow greater flow of
water. ( See Figure 9)
Have water analyzed. If iron content is greater than .1 mg/liter, a filter will have to be used.
Consult factory with water analysis
Unit fills to the cylinder full condi-
tion and remains cold.
Check between Test Point #3 and ground with a multimeter set on VDC scale. Confirm the
circuit board is seeing low current flow (<2.8 VDC). Proceed to next step.
If on initial fill, unit reaches less than 70% of rated capacity (2.8 VDC on Test Point #3),
adjust the drain threshold pot, “% adj.” (R18), down 2-3%. Manually drain the unit down
completely and add ½ Alka Seltzer tablet via the fill tee(GT-120). Restart the unit while
monitoring the amp draw. Fill unit ¼ full and turn “off” for several minutes to allow tablets to
dissolve. Restart unit. If amperage rises rapidly, it may be necessary to dilute the water. If
amperage rises slowly, add another Alka-Seltzer tablet.
Check that drain valve is sealing properly.
Check the water conductivity and consult the factory.
Unit turned on and cycles for a
short period of time. Then it stops
in the middle of a fill cycle and
won’t reset until boiling stops.
Check cylinder fill interface connections.
Check cylinder connections (See Figure #11)
Check items in next troubleshooting tip concerning foaming.
Check amperage between cylinder full electrode and cylinder full interface terminal #1. If it
is greater than 7.0 mA AC, take a fill water sample and consult the factory.