Installation guide

SYMPTOM
Head pressure too low
Excessive suction pressure
Su_ion pressure too low
Compressor runs but outdoor fan does not
IFM does not run
IFM operation is intermittent
IFM-Indoor Fan Motor
Table 7--Troubleshooting Chart (Cont'd)
CAUSE
LOW retngeran( charge
Restriction in liquid tube
(Heat) OutdoOr coil frosted
(Cool) High Heat load
Reversing valve hung up or leaking internally
Refhgerant overcharged
(Cool) Dirty air filter
(Heat) Outdoor coil frosted
LOW refdgerard charge
Metehng device or tow side restricted
(Cool) Insufficient coil airflow
(Cool) Temperature too low in conditioned area
(Cool) Outdoor ambient below 40°F
Filter-dder restricted
NC (normally oiosed) contacts on defrost board
open
Blower wheel not secured te shaft
Insufficient voltage at motor
Power connectors not propedy seaJed
Water dripping into motor
Connectors not firmly sealed
REMEDY
Check for leaks, repair and recharge
Remove restdction
Move timer on con('r_ boar_ to 30 mirlutet;
between defrost cycles
Check for source and eliminate
Replace valve
Recover exce_s refrigerant
Replace filter
Move timer on control board to 30 minutes
between defrost cycles
Check for leaks, repair and recharge
Remove source ol restdctior_
Increase air quantity
Check filter-replace if necessary
Reset thermostat
Instell low-ambient kit
Replace
Check con_tlon of relay on beard
Replace it necessary
Prc_pedy tighten b_ower whee_ to shaft
Determine cause and Correct
Connectors shouJd s_ap eastiy: do not force
Vedfy proper ddp loops in connector wires
Gently puti wires individually to be sure they are
crimped into the housing
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