14
Section 5: System Troubleshooting
Problem: Motor does not run on HAND or AUTO.
Solution:
1. Check power source.
2. Check recovery tank.
If recovery tank is not yet full then check for defective alarm indicator bulb on control panel box (a
faulty light will stop control panel operation).
3. Check Tankfull probe.
4. Disconnect Tankfull cable connector from connector box and jumper sockets A & B in the receptacle.
If motor runs, the problem is in the Tankfull probe itself.
Confirm that the Tankfull float is free on its shaft.
When the Tankfull probe is disconnected, the red indicator light will come on. See Tankfull
diagnostic later in this section.
5. If no open circuit is found and the motor still does not run, disconnect power, open the EP box and
check the fuses.
115VAC systems will have one 20 AMP fuse and one 1 AMP fuse.
All 230VAC systems have two 8 AMP fuses and one 1 AMP fuse.
Replace fuses if necessary and reseal the box.
Problem: Motor runs on HAND but not on AUTO.
Solution:
Most problems on the AUTO setting can be traced to float malfunctions. Examine the product float and confirm
that it is not heavy and that it can freely move up and down throughout its normal travel. Also check to see that
the water float is not stuck in the up position and that there are no obstructions between the float and its seat. If
the probe was cleaned, verify that neither float has been re-installed upside down.
If a float malfunction is not the problem, examine the control cable for cuts and breaks, then use an ohmmeter
to test the probe control circuit (refer to
Section 8: System Schematic
). In the probe cable receptacle are three
pins labeled A, B, and C. With the meter on the R x 1 scale, these receptacles should read electrically as
follows:
A-C
Open when water float is down.
A-C
Closed when water float is up.
Disconnect power before opening any enclosure. Carry out troubleshooting procedures in
a non-hazardous (non-flammable) location.
When resealing any explosion proof box, clean the cover flange and coat it with LUB-G flame
joint grease.
