Environmental Express HotBlock CAL 3300 - Manual (Page 19)

of the terminal board (note: terminal #2 of the terminal board contains 3 white wires. To ensure you have the
correct wire, trace it back and ensure it originates from the graphite portion of your HotBlock.
3. Set your volt-meter to measure ohms ( W )
4. Touch the red lead to one of these wires and touch the black lead to the remaining wire.
5. If your reading is “OL” (over limit) or a value greater than 25 ohms, then the heater mat has failed and it must
be replaced (see parts list, page 13).
n Controller—To test the controller, the output voltage must be determined with a volt-meter. To measure
voltage from the controller, follow these steps:
Caution: This procedure is a potential electrical hazard and should only be performed by qualified personnel.
1. Remove the bottom panel of your HotBlock by unscrewing the rubber feet.
2. Locate the solid state relay mounted to the bottom panel.
3. Set your volt-meter to measure DC voltage.
4. Touch the red lead to terminal (RED) and the black lead to terminal (BLUE) of the solid state relay.
5. Your volt-meter should read 3V-16V.
6. If your volt-meter does not read 3V-16V, perform steps 3 and 4 on the red and blue (5 and 6) wires at the
terminal board and controller to determine if there is a faulty or loose connection.
7. If you do not get a reading of 3V-16V at terminals 3 (red) and 4 (blue) of the controller then the controller
has failed internally and it must be replaced (see parts list, page 13).
The temperature controller is performing erratically or displays an error message.
The temperature controller is flashing Er.L Attn- Thermocouple Fault
First reset default settings
1. Hold the up and down arrow buttons for six seconds until Ai Set appears
2. Hold the down arrow until glbl set is in the window
3. Press the green advance key to enter
4. Continue pressing the green advance key until none user appears.
5. Press the down arrow key until Set1 user appears.
6. Pressing the advance key will restore default settings.
To troubleshoot the thermocouple, follow these steps:
1. Power off your HotBlock.
2. Remove the bottom panel of your HotBlock by unscrewing the rubber feet.
3. Locate the thermocouple wires at terminals 1 (yellow) and 2 (red) of the controller and remove using a small
screwdriver.
4. Cut the exposed ends of the two wires.
5. Strip 1/4" of insulation from each wire and reconnect them to the appropriate controller terminal and tighten.
6. Power on your HotBlock.
7. If your display continues to flash Er.1 Attn- the thermocouple is faulty and must be replaced
(see parts list, page 13).
Troubleshooting Guide
HotBlock Operation Guide
Environmental Express • 18 Call 1.800.343.5319