Adjusting The Control In Restricted Mode; Troubleshooting; Fault Codes - Penn A421 Series Installation Manual

Adjusting the control in Restricted mode

To adjust the OFF value and shift the On and OFF control band within the restricted adjustment
range, when the control is in the restricted adjustment mode, complete the following steps:
On the Main Screen, press MENU to go to the Restricted Adjustment mode menu and display
1.
the OFF parameter code screen (Figure 14).
To go to the OFF value screen, press MENU again.
2.
On the OFF value screen, press Down or Up to change the OFF value within the restricted
3.
adjustment range only.
To save the selected OFF value and return to the OFF code screen, press MENU.
4.
To return to the Main screen, press Down and Up simultaneously.
5.
Figure 14: Adjusting temperature in the Restricted menu

Troubleshooting

A421 Series Controls display fault codes on the LCD as described in Table 4.
Table 4: Fault codes
Fault code Definition
SF flashing Open temperature
alternately sensor or sensor wiring
with OP
SF flashing
Shorted temperature
alternately sensor or sensor wiring
with SH
System status
Output functions
according to the
selected SF mode
Output functions
according to the
selected SF mode
A421 Series Electronic Temperature Controls with Off-Cycle Defrost Installation Guide
Solution
See Troubleshooting procedure.
Cycle power to reset the control.
See Troubleshooting procedure.
Cycle power to reset the control.
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