OTCW 4/11
6
TECHNICOLD TEMPERATURE CONTROL
Troubleshooting Error Messages
Display Messages
E1 - Appears when either the up or down key is pressed when not in the programming mode.
To correct: If the E1 message appears when no keys are being pressed, replace the control.
E2 - Appears if the control settings are not properly stored in memory.
To correct: Check all settings and correct as needed.
EP - Appears when the probe is open, shorted or sensing a temperature that is out of range.
To correct: Check to see if the sensed temperature is out of range. If not, check for probe damage by
comparing it to a known ambient temperature between -30o F and 220o F. Replace the probe if neces-
sary.
Contact your Technicold representative for a replacement probe and installation instructions.
EE - Appears if the EEPROM data has been corrupted.
To correct: Replace the control.
CL - Appears if calibration mode has been entered.
To correct: Remove power to the control for at least 5 seconds. Reapply power. If the CL message still
appears, replace the control.
Installation Instructions - Important
1. All TTC series controls are designed as operating controls only. If an operating control failure could result
in personal injury or loss of property, a separate safety control and/or alarm should be installed.
2. The schematic drawings and other information included in these installation instructions are for purpose
of illustration and general reference only.
3. These instructions do not expand, reduce, modify or alter the Technicold Terms in any way; and no
warranty or remedy in favor of the customer or any other person arises our of these instructions.
4. Technicold TTC controls have been approved by Underwriter's Laboratories as UL listed; however,
approval does not extend to their use for any other purpose. Technicold assumes no responsibility for any
application of its control unless Technicold has approved such application in writing.
5. It is the responsibility of the installer and the user to assure that his or its application and use of all
Technicold products are in compliance with federal, state and local requirements, including, without any
limitation, all requirements imposed under the National Electric Code and any applicable codes and
regulations.
Lockout Switch
The TTC is provided with a lockout switch to prevent tampering by unauthorized
personnel. When placed in the LOCK position, the keypad is disabled and no
changes can be made. When placed in the UNLOCK position, the keypad will
function normally.
To access the lockout switch, disconnect the power supply and open the control.
The switch is located on the inside cover about 2 inches from the bottom (Figure
2). To disable the keypad, slide the switch to the left LOCK position. To enable
the keypad, slide the switch to the right UNLOCK position. All TTC controls are
shipped with this switch in the LOCK position.
Figure 2: Lockout Switch
