Dear Project Manager
As reported by the QQQ Technician, the malfunction pressure sensors of the refrigerator at FFF is still not yet rectified due to out-of-stock parts and the requirement of at least a 1 month delivery time. That means the defective machine will not be rectified until the new sensor is in stock at the local supplier.
The present arrangement is totally unacceptable and the potential risk of interruption to the operation of the building exists. Please instruct project contractor (ABC) to take every opportunity to rectify the defect within 5 days. In order not to jeopardize the service of the building, also provide an on-site technician to be on 24 hr. standby until the refrigerator has resumed its normal status.