AERCO SWDW68 U-Tube Double-Wall Heaters w/ECS - Manual (Page 95)

HE-
111 − APPENDIX A
Rev B Mar 2013 A-9
Table A-3. Diagnostic Alarms - continued
DISPLAY MEANING WHAT TO DO
Err2 Error 2: RAM self-test fail Return Controller for repair
Err3 Error 3: Watchdog fail Return Controller for repair.
Err4 Error 4: Keyboard failure. Stuck
button or button was pressed
during power-up Switch power off and then on, without touching any of the
controller buttons
Err5 Error 5: Faulty internal
communication Check printed circuit board interconnections. If the fault
cannot be cleared, return the controller for repair.
Err6 Digital filter chip faulty or loose
board inside controller Return Controller for repair
Err7 PV ID failure Return Controller for repair
Err8 Module 1 ID failure Faulty or loose module, or isolation problem
Err9 Module 2 ID failure Faulty or loose module, or isolation problem
ErrA Module 3 ID failure Faulty or loose module, or isolation problem
dCF DC output failure Return Controller for repair.
O P E n Secondary Input Missing or
Disconnected This error may result from no power to the flow meter (check for
green power light on rear of meter or 0-5V flowmeter signal
connections), or a disconnection of the Molex connector between
feedforward sensor and the Eurotherm controller.
A.3.3 Clearing the Hardware Error Display
To clear a hardware error (HW.ER) and reset the Temperature Controller, proceed as follows:
1. Simultaneously press the Page ( ) and Scroll ( ) buttons on the Temperature Controller.
2. Using the Up
(▲) arrow button, change the password to “8”.
3. Simultaneously press the Page ( ) and Scroll ( ) buttons again and observe the Temperature
Controller display. The top line will display “8” and the bottom line will display “NO”.
4. Press the Up
(▲) arrow button to toggle the display from “NO” to “YES”.
5. Simultaneously press the Page ( ) and Scroll ( ) buttons to “Reset” the Temperature
Controller and clear the hardware error.