Unit Start-up
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15
CA Model
8733942456(2016/04)
CA Model
2.
Long length thermostat and control wiring leads
may create voltage drop. Increase wire gauge or up-
size transformers may be required to ensure
minimum secondary voltage supply.
3.
FHP recommends the following guidelines for wiring
between a thermostat and the unit: 18 GA up to 60
foot, 16 GA up to 100 ft and 14 GA up to 140 ft.
4.
Do not apply additional controlled devices to the
control circuit power supply without consulting the
factory. Doing so may void equipment warranties.
5.
Check with all code authorities on requirements
involving condensate disposal/over flow protection
criteria.
UNIT START-UP
1.
Set the thermostat to the highest setting.
2.
Set the thermostat system switch to “COOL”, and
the fan switch to the “AUTO” position. The reversing
valve solenoid should energize. The compressor and
fan should not run.
3.
Reduce the thermostat setting approximately 5
degrees below the room temperature.
4.
Verify the heat pump is operating in the cooling
mode.
5.
Turn the thermostat system switch to the “OFF”
position. The unit should stop running and the
reversing valve should de energize.
6.
Leave the unit off for approximately (5) minutes to
allow for system equalization.
7.
Turn the thermostat to the lowest setting.
8.
Set the thermostat switch to “HEAT”.
9.
Increase the thermostat setting approximately 5
degrees above the room temperature.
10. Verify the heat pump is operating in the heating
mode.
11. Set the thermostat to maintain the desired space
temperature.
12. Check for vibrations, leaks, etc.
TROUBLESHOOTING
Troubleshooting Information Solution
column may reflect a possible fault that may
be one of, or a combination of causes and
solutions. Check each cause and adopt
“process of elimination” and or verification
of each before making any conclusion.
CUC FAULT CODES
Blinks
Description
....
1
......
High Pressure Lockout, Freeze
....
2
...........
Low Pressure Lockout
UPM Board LED Indications
Indication
Color
Blinks
Description
GREEN
Solid
18-30 VAC Power is present
RED
1
High pressure lockout
RED
2
Low pressure lockout
RED
3
Freeze sensor lockout
RED
4
Condensate overflow
RED
5
Brownout
RED
6
Evaporator Freeze condition
