Errors

• - select type -
• Greenstar KBR16-3
• Greenstar KBR21-3
• Greenstar KBR28-3
• Greenstar KBR35-3
• Greenstar KBR42-3
• Greenstar KWB28-3
• Greenstar KWB35-3
• Greenstar KWB42-3
• Greenstar ZBR16-3A
• Greenstar ZBR21-3A
• Greenstar ZBR28-3A
• Greenstar ZBR35-3A
• Greenstar ZBR42-3A
• Greenstar ZWB28-3A
• Greenstar ZWB35-3A
• Greenstar ZWB42-3A

• - select code -
• A7
• A8
• Ad
• b1
• b2
• b3
• b4
• b5
• b6
• b7
• C6
• CC
• d3
• d5
• E2
• E3
• E9
• EA
• F0
• F1
• F7
• FA
• Fd

Boiler type Greenstar ZBR21-3A

Error code CC

Cause:

Outdoor temperature sensor not recognized.

Solution:

Check outdoor temperature sensor and leads for interruptions, replace if defective.
Verify the outdoor temperature sensor is connected to terminals A and F.