“Your Work” and “Your Product” Exclusions

This question concerns ISO form CG 00 01 10 01; exclusions for Property Damage arising out of “your work” or operations. The policyholder was hired to replace a heat exchanger on an HVAC system. The procedure required the insured to disconnect some hoses in which caustic materials flowed. Also, to access the heat exchanger the policyholder's employee had to move the AC coil though he did not have to remove it in full. The employee completed the installation of the heat exchanger. He reconnected the hoses, but did so improperly, causing the caustic material in the hose to leak onto the A/C coil. The corrosion required replacement of the A/C coil.

Is either exclusion J (5) or exclusion K triggered for the damage to the A/C coil?