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Control System Diagnostics
LED Status Flashing Rate Fault Description
Slow Flash
One ash per
second
Normal operation:
No call for heat
Fast Flash
Two ashes per
second
Normal operation:
Call for heat
2 Flash
Two ashes in
1 second with
1-second pause
System lockout:
Failed to detect or
sustain ame
3 Flash
Three ashes in
1.5 seconds with
1-second pause
Pressure switch senses
incorrect pressure or
gas valve coil is open
4 Flash
Four ashes in
2 seconds with
1-second pause
High limit or rollout
switch open
5 Flash
Five ashes in
2.5 seconds with
1-second pause
Flame sensed and gas
valve not energized
Steady –
Internal failure:
Micro-controller failure;
self-check
TABLE 5. Fault Codes
CHARGING
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
For maximum performance of the cooling system, the op-
erating temperatures and pressure should be checked and
subcooling determined at Standard ARI test conditions of
82° F outdoor temperature / 80° F indoor dry bulb / 67° F
indoor wet bulb.
For maximum performance of the heat pump, the oper-
ating temperatures and pressure should be checked and
subcooling determined at Standard ARI test conditions of
47° F outdoor temperature / 70° F indoor dry bulb.
If subcooling measurement deviates, refrigerant charge
should be adjusted accordingly for maximum performance.
TABLE 6
AC Unit Cooling System Performance Values - LRP14
Model
Suction Superheat
+ / - 3°
Liquid Subcooling
+ / - 2°
2 Ton 10
2.5 Ton 14
3 Ton 13
3.5 Ton 12
4 Ton 14
5 Ton 17
Based on outdoor ambient temperature of 82º F and indoor
entering air of 80º F db, 67º F wb.
TABLE 7
Heat Pump Cooling System Performance Values -
LRP14HP / LRP16HP
Model
Suction Superheat
+ / - 3°
Liquid Subcooling
+ / - 2°
2 Ton 18
2.5 Ton 16
3 Ton 14
3.5 Ton 9
4 Ton 8
5 Ton 5
Based on outdoor ambient temperature of 82º F and indoor
entering air of 80º F db, 67º F wb.
TABLE 8
Heat Pump Heating System Performance Values -
LRP14HP / LRP16HP
Model Liquid Subcooling + / - 2°
2 Ton 25
2.5 Ton 15
3 Ton 11
3.5 Ton 22
4 Ton 24
5 Ton 28
Based on outdoor ambient temperature of 47º F and indoor
entering air of 70º F db.
TABLE 9
Unit Cooling System Performance Values - LRP16GE
Model Liquid Subcooling + / - 3°
2 Ton 10
3 Ton 12
4 Ton 10
5 Ton 9
Based on outdoor ambient temperature of 82º F and indoor
entering air of 80º F db, 67º F wb.
MAINTENANCE
The heating and air conditioning system should be inspect-
ed and maintained twice each year (before the start of the
cooling and heating seasons) by a licensed professional
HVAC technician. The technician is expected to check the
following items. These checks may only be conducted
by a licensed professional HVAC technician.
1 - Inspect component wiring for loose, worn or
damaged connections. Check for any rubbing or
pinching of wires. Conrm proper voltage plus
amperage of outdoor unit.
2 - Check the cleanliness of fan and blade condition
(cracks) and clean or replace them, if necessary.
3 - Inspect drain pan for debris and clean as necessary.
4 - Inspect the condition of refrigerant piping and conrm
that pipes are not rubbing copper-to-copper. Also,
check the condition of the insulation on the refrigerant
lines. Repair, correct, or replace as necessary.
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