74
Table 64 — CV Units LED Diagnostic Codes
*Freeze protection and condensate overflow lockout require optional
sensors.
NOTE: The main control board has a red LED (light-emitting diode) for
fault indication and will blink a code as described above. Count the
number of blinks to determine the lockout condition.
SCHEMATICS
Refer to Fig. 89-93 for voltage and wiring schematics.
NO. OF BLINKS DESCRIPTION
1 1st Stage High-Pressure Lockout
2 1st Stage Low-Pressure Lockout
3 2nd Stage High-Pressure Lockout
4 2nd Stage Low-Pressure Lockout
5 Freeze Protection Lockout*
6 Condensate Overflow Lockout*
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