Printed in U.S.A. 3/21
FR# 443741-00 Rev. 6
©Copyright 2021 Dwyer Instruments, Inc.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219-879-8000
Fax: 219-872-9057
www.dwyer-inst.com
e-mail: [email protected]
DISPLAYING ROOM TEMPERATURE
If the P5 parameter is set to display the temperature set point, the probe temperature
can be displayed by pressing the DOWN ARROW key for two seconds until Pb1 is
displayed. Next, hit the SET key. To return to the normal display, press SET key.
MANUAL DEFROST ACTIVATION/DEACTIVATION
To manually activate the defrost cycle, press the UP ARROW key for four seconds.
This feature is disabled during heating operation.
PARAMETER LOCK OUT ACTIVATION/DEACTIVATION
The key pad lock out can be activated/deactivated by pressing the SET and
DOWN ARROW keys simultaneously for two seconds. The display will flash Loc or
UnL to signify the change in states.
ALARM BUZZER RESET
The audible alarm can be silenced by pressing any key.
RESTORING FACTORY DEFAULT SETTINGS
Factory settings can be restored by following the below procedure:
• Pressing the UP ARROW and DOWN ARROW keys for four seconds until PA is
displayed
• Press the SET key
• Press the UP ARROW or DOWN ARROW to adjust the value to 743
• Press SET key
• Pressing the UP ARROW and DOWN ARROW keys for four seconds until dEF is
displayed
• Press SET key
• Press the UP ARROW or DOWN ARROW to adjust the value to 149
• Press SET key
• Cycle the power after the flashing dEF goes away
MAINTENANCE, CLEANING AND REPAIR
After final installation of the unit no routine maintenance is required. Clean the surface
of the display controller with a soft and damp cloth. Never use abrasive detergents,
petrol, alcohol or solvents. A periodic check of the system calibration is recommended.
The Series 40T/40M is not field serviceable and should be returned if repair is needed
(field repair should not be attempted and may void warranty). Be sure to include a
brief description of the problem plus any relevant application notes. Contact customer
service to receive a return goods authorization number before shipping.
DISPLAY MESSAGES
Out 1
solidly lit
Output 1 is active
Out 1
flashing
Either modification of set point or call for load during load protection
(C1 or C2)
Defrost cycle is active
Alarm condition is present
°C
Temperature is measured in °C
°F
Temperature is measured in °F
Loc
Key pad is locked
Pr1
Probe 1 error
