2.2HOW TO LOCK THE KEYBOARD
1. Push and hold the UP + DOWN keys for more than 3 seconds.
2. The “POF” message will be displayed and the keyboard is locked. At this point it is only possible to view the set point.
3. Repeat step 1 to unlock the keyboard.
2.3HOT KEY PROGRAMMING (FOR FACTORY SUPPORTED FIELD REPROGRAMMING)
To upload a program from a control to a HOT KEY:
Insert HOT KEY into the TTL connection on the back of the control. Press and hold UP + DOWN keys momentarily then press the UP key. The “Upl” message will appear while uploading is occurring and the
+ “End” message will appear when finished. Push any key to return to normal operation.
To download a program from a HOT KEY to a control:
| Press the ON/OFF key to turn off the control. Insert the HOT KEY into the TTL connection on |
| the back of the control. Press the ON/OFF key again and downloading will begin. The “don” |
ON/OFF | message will appear while downloading is occurring and the “End” message will appear |
when finished. Push any key to return to normal operation. |
3.ALARMS
Alarm messages are displayed in the upper LED readout and alternate with the default display. An alarm LED icon is also illuminated.
Message | Cause |
“P1” | Probe 1 failure |
“P2” | Probe 2 failure |
“P3” | Probe 3 failure |
“HA” | High temperature limit set point exceeded |
“LA” | Low- temperature alarm |
HP | High gas pressure/low water |
LP | Low gas pressure alarm |
Mn1 | Maintenance alert for |
Mn2 | Maintenance alert for second stage |
Mn3 | Maintenance alert for freeze protection |
“rtc” | The real time clock has lost the setting |
“rtF” | Real time clock failure |
Results of alarm condition
-Call for heat and burner second stage interrupted; modulation output signal will revert to low fire
-Freeze protection is disabled
-Outdoor reset disabled
-Warm weather shut down disabled
-Buzzer sounds, operation continues
-Buzzer sounds, operation continues
-Unit deenergized after time delay
-Unit deenergized after time delay
-Buzzer sounds, operation continues
-Buzzer sounds, operation continues
-Buzzer sounds, operation continues
-Energy saving functions disabled
-Energy saving functions disabled
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