Kennett Square, PA

7/17/26. Fully assessed no cooling situation on recently installed Mitsubishi (2) head mini split system. Found ice outside and outside unit. Gave upstairs unit a call for cooling and found it not cooling. Found that the refrigerant was flowing to the downstairs head. Switched all wiring between B&C wiring. Also adjusted voltage settings in power monitoring disconnect. Tested each head individually and checked temperature splits, they were both around 19 degrees. Checked 454b pressures for both heads. Found eev head was hanging up , tapped on head with crescent wrench and suction pressure went from 60 to 98 pipe un thawad in front of me. Water test ed both systems.Mini split heat pump is working properly at time of service.

I arrived to look at a new mini split system that was installed two days ago. Customer complaint that it wasn’t cooling enough upstairs. I had both units on downstairs. I had a 20° split upstairs had about a 10 to 12 split went to the outdoor unit. It was frosting up . I checked my wiring the wiring didn’t look like it was crossed, and when I did run them individually the units, I could feel the lines to coordinate with the powered wires. I had 66 suction on the second floor system and 86 suction on the lower level was 275 so I had a suction saturation of 17 and saturation discharge of 94 low charge. One line is about 80 feet the other one is about 25 foot. We have 2 guys going out tomorrow to pull the charge and check for leaks.

Customers cooling setpoint is 78° during day and he drops it to 76° overnight. Humidity stays at 60% as read by Ecobee thermostat. Noticed thermostat was displaying humidity of 64% but my psychrometer was reading 54% I took thermostat off and put back on. It went through an 8 min calibration and thermostat reading close to my psychrometer now. I started by setting “AC Overcool Max” on Ecobee to 2° Then selected “Dehumidify using AC” and set target to 54%. Effectively this will run the AC and overcool 2° beyond the setpoint in the interest of getting humidity down to 54%. We are telling the equipment “continue to run the AC to dehumidify” Also enabled accelerated cooling/heating at outdoor control and diaboled adaptive capacity. This will result in the indoor coil temperature dropping quicker thereby increasing dehumidification. Fan Speeds: 1134 CFM in 1st Stage 1288 CFM in 2nd Stage. Good Temperature split 20.5° Good The humidity could be related to a building performance issue.

Completed QA for 3 Ton Bosch inverter heat pump install. Filter size is 18x20x1; clean Went over all aspects of install: mechanical, wiring, controls, configuration, refrigeration charge. Accelerated cooling is enabled and adaptive capacity is disabled using outdoor control. I addressed water safety issues (wiring and filed wet switch) on a service call 6/12/26 Wrapped trap in foam insulation tape. 8° SC when it ramps up to 70+ Hz Temperature split 20° Install passes QA inspection

Completed QA for 3 Ton Bosch inverted heat pump install. Inspected all aspects: mechanical, wiring, controls, ductwork connections, piping, etc. Accelerated cooling and heating is enabled. Adaptive capacity disabled. Using outdoor control. (2) Water safeties are wired and configured to produce custom alerts. Refrigerant charge and temperature split: Good. Cycled on 6/12/26 Wrapped ez trap in foam insulation tape Install passes QA.

Completed QA for install Propane Furnace/heat pump hybrid. Replaced 16x25x1 filter Inspected all aspects of install: mechanical, ductwork connections, wiring, controls, etc Equipment not properly grounded the ground was landed on the receptacle at the 4x4 box but not to the found of the funace controls. Added ground today. Furnace breaker not labeled in panel *was labeled Refer… Changed heating fan speed from, 1830 to 1620 Wired (3) water safeties so they produce custom alerts and disable heating cooling and dehumidification and enable fan. Power monitor settings: Over-voltage: 264; under-voltage: 216, delay: 2 seconds, restore: 3 min (180 sec). Furnace combustion tests: Pass. Unit was running at 2.9° SC in second stage. I added 33 oz r454B to get to 10° SC. Outdoor temperature 80°. Unit was installed end of April so understand that it is t charged perfect Install passes QA. Pay attention to grounding!

Estimate

Estimate

7/8/26. Fully assessed no cooling situation. Found thermostat was going blank every so often. Went up in attic and found dirt in drain line that was causing the ez trap float switch to shut off the system. Tried calling several phone numbers to get a hold of someone to talk about the clogged drain line this is not covered under warranty our office to bill out. Cleared drain line.

7/7/26 Installed ZapPro surge protector at outdoor equipment contactor inside service panel. Installed VZPro surge protector for indoor blower motor. Replaced REME air cleaner cell. Tested system afterwards Aprilaire 413 filter Good Temperature split 21° System operating well at this time. Homeowner paid balance today,