Every time the module powers up, the last ALERT LED flash code that occurred prior to shutdown is displayed for
60 seconds. The module will continue to display the previous flash code until the condition returns to normal or 21VAC is removed from the module. TRIP and ALERT LEDs flashing at the same time means control circuit voltage is too low for operation.
24VAC Power Wiring
The diagnostic module requires a constant nominal 24VAC power supply. The wiring to the module’s R and C terminals must be directly from the indoor unit or thermostat. The module cannot be powered by R and C terminals on the defrost board without experiencing nuisance alerts.
Flash Codes (cont.)
Table 11
Issue 1007 | Page 21 |
