Installation guide

SYMPTOM
Compressor and outdoor fan
will not start
Compressor will not start but condenser fan
fulls
Three-phase scroll compressor (size 030-
060 units) may be a low pressure differential
Compressor cycles (other than normally
satisfying thermostat)
Compressor operates continuously
Excess_ehead pressure
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Table 7--Troubleshooting Chart
CAUSE
Power Failure
Fuse ffiown or circuit breaker tnpped
Defective thermostat, contacfor, transformer,
control relay, defrost board, or high pressure or loss-
of-charge/low pressure switch
thsuffic_ent line voffage
Incorrect or faulty wiring
Thermostat setting too high
Units have a 5-minute time delay
Faulty wiring or loose connections in compressor
cttcuff
Compressor motor burned out, seized, or
internal ovedoad open
Defective run capacitor, overload, or PTC
(positive temperature coefficient) thermistor
REMEDY
Call power company
Replace fuse or reset circuit breaker
Replace component
Determine cause and correct
Check widng diagram and rewire correctly
Lower thermostat setting below room
temperature
CO NO]- bypass this compressor time
detey-wait for 5 minutes until time-delay
relay is deenergized
Check winng and repair or replace
Determine cause.
Replace compressor
Determine cause and replace
One leg of 3-phase power dead
Low input voltage (20 percent low)
Scroll compressor is rotating in the wrong
direction
Refrigerant overcharge or undercharge
Defective compressor
Insufficient line voitege
Blocked outdoor coil
Defective run/start capacitor, overload or start
relay
Defective thermostat
Faulty outdoor-fan motor or capacitor
Damaged reversing valve
Restriction in refrigerant system
Dirty air filter
U_t uncJersized for load
Thermostat set too low
Low refrigerant charge
Frosted coil with incorrect defrost operation
Air in system
Outdoor coil dirty or restricted
Dirty air tilter
Dirty indoor or outdoor coil
Refrigerant overcharged
Air itt system
(Heat) Indoor air restricted or re_rcniatit_g
Indoor or outdoor air restdcted or air short-cycling
Replace fuse or reset circuit breaker. Determine
cause
Determine cause and correct
Correct the direction of rotation by reversing the
3-phase power leads to the unit
Recover refdgerant, evacuate system, and
recharge to capacities shown on nameplate
Replace and determine cause
Determine cause and correct
Determine cause and correct
Determine cause and replace
Replace thermostat
Replace
Determine cause and correct
Locate restriction and remove
Replace filter
Decrease _oad or it_crease unit size
Reset thermostat
Locate leak, repair, and recharge
Check defrost time settings
Reset as necessary
Check defrost temperature switch
Replace as necessary
Recover refdgerant, evacuate system,
and recharge
Clean coil or remove restriction
Replace filter
Clean coil
Recover excess refrigerant
Recover refrigerant, evacuate system,
and recharge
Determine cause and correct
i Determine cause and correct
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