Troubleshooting, Maintenance – HP H4H3 User Manual
3-phase R-410A Split System Heat Pump
506 01 5102 00
Some models are factory equipped with the Comfort
t Diagnostics device in the control box (refer to
Figure 15). Comfort Alert provides around-the-clock
monitoring for common electrical problems, compressor
defects, and broad system faults. If trouble is detected, an
alert code is displayed with a flashing LED indicator.
NOTE: Comfort Alert is required for unit operation.
Comfort Alert provides active safety protection and
compressor may be shut down. Alert codes are listed in
Figures 16 and 17.
Comfort Alert is factory wired and requires no
modification. Low voltage lead wires are provided in the
control box for connection to thermostat wires (use wire
The Comfort Alert device operates by monitoring the
compressor power leads and the thermostat demand
signal (Y terminal). It draws constant 24 VAC power at the
R and C terminals.
24 VAC for Thermostat
24 Volt Power
24 Volt Common
24 Volt Compressor
Pass Through Holes (3)
During the cooling season, check monthly for free flow of
drainage and clean if necessary.
These tips will help keep the air conditioner looking better
and working more efficiently:
Free flow of air is essential. Keep fences, shrubs,
trash cans, and other obstructions at least 18
inches from all coil inlets.
Keep the coil free of grass clippings, leaves,
weeds, and other debris.
NOTE: Coil may occasionally require cleaning with
a liquid solution. The coil must be cold when
cleaning. Use an alkaline based cleaner only.
Cleaning a hot coil or using an acid based cleaner
will remove the paint from the fins and may clog the
Never use a weather cover over the outdoor unit
unless it is a ventilated type or made of breathable
fabric that will allow moisture to evaporate rapidly.
A cover that holds moisture in the unit will cause
more rust build-up and damage than normal
exposure to weather.