Environmental Express Soil-Cell - Manual (Page 13)

800.745.8218 / 843.576.1147 / www.environmentalexpress.com Environmental Express • 11
Soil-Cell: Operation and Instruction Manual Troubleshooting Your HotBlock TM
The controller digital display will
not illuminate. There are two possible reasons that your controller will not illuminate.
1. The controller is not getting voltage or;
2. The controller itself has failed internally.
The problem can be effectively diagnosed by determining if the controller is or
is not getting voltage using the following steps:
1. Confirm that the power cord is plugged securely into the HotBlock TM
receptacle and a working outlet.
2. Confirm that the switch is in the “on” position. Press button on the back of
HotBlock TM .
3. Check the fuse located in the power module:
a. Locate the fuse drawing indented into the power module next to the
socket.
b. Using a small screwdriver, pry open the fuse compartment cover.
c. Examine the exposed fuse for a break in the filament and if necessary,
check for continuity using a volt-meter.
d. If the fuse is determined to be blown, replace it with the spare fuse
located in the slide-out compartment beneath the operating fuse.
Caution: This procedure is a potential electrical hazard and should
only be performed by qualified personnel.
4. Inside the HotBlock TM , check voltage leading from the power module to
the controller:
a. Remove the bottom panel of the HotBlock
TM by unscrewing the rubber
feet.
b. On the back of the controller, locate the black wire at terminal 98 and
white wire at terminal 99.
c. Set your volt-meter on AC voltage.
d. Touch your red lead to the exposed white wire and black lead to the
exposed black wire.
e. If your volt-meter reads 110-122V, the controller is receiving power but
has failed internally. It must be replaced.
f. If your volt-meter registers less than 110-122V, using step d above check
the black and white wires at the terminal board and then at the power
module to determine if there is a faulty connection.
HotBlock TM Troubleshooting Guide:
Please consult the following troubleshooting guide if you experience problems with your HotBlock TM . See wiring
schematic
(page 10) for component identification. If you are unable to resolve the problem or if replacement components are necessary,
please contact technical service at 1-800-745-8218 as component replacement varies in degree of difficulty. We recommend
that only qualified personnel attempt troubleshooting electrical components.
When the HotBlock TM is initially powered on, the controller will cycle through a self-test sequence. It will then display the
current temperature and begin heating until it reaches your set point temperature, where it will hold until the unit is powered
off. The set point may be changed at any time. A change in the controller’s factory default settings or a failed component may
cause the HotBlock to perform unsatisfactorily or render it inoperable.