Lennox ZCD036 Error Codes

Packaged HVAC · Packaged Unit

Model numbers in this family: ZCD036, ZCD048, ZCD060, ZCD074, ZGD036, ZGD048, ZGD060, ZGD074

• 1 RDS Sensor Fault
• 2 VFD alarm / Drain pan overflow
• 257 Refrigerant leak sensor fault in the Indoor section (sensor #1)
• 258 Refrigerant leak sensor fault in the control panel/compressor section (sensor #2)
• 3 Incompatible sensor installed
• 4 Sensor communication issue
• 5 R-input not available
• 6 Invalid configuration of sensor count
• DS2 Green Alternating Slow Flash, DS1 Red Alternating Slow Flash 5-min. anti-short cycle delay
• DS2 Green OFF, DS1 Red OFF Power Problem
• DS2 Green OFF, DS1 Red ON Loss of Charge Fault
• DS2 Green OFF, DS1 Red Slow Flash Loss of Charge Fault
• DS2 Green ON, DS1 Red OFF High Pressure Lockout
• DS2 Green Simultaneous Slow Flash, DS1 Red Simultaneous Slow Flash Normal Operation
• DS2 Green Slow Flash, DS1 Red OFF High Pressure Fault
• Flashing blue Mitigation (Leak Detected)
• Flashing green Initializing
• Solid blue, interrupted by red flash code Fault / Service
• Solid green Monitoring

Reference only. Confirm against the manual for your exact model. Data release 105f66ecb9e96e5dc473025d.