Whirlpool DryAire LMA1053L Specifications download pdf (Page 32)

10.3. Evaporator Coil Freeze Up

ntering air temperature too low. Raise entering air temperature.

Insufficient evaporator air flow. Check system air flow, dirty filters/coils or restricted

ductwork.

Lack of refrigerant. Check suction pressure and evaluate unit charge.

Restriction in filter dryer. Check pressure drop and replace if necessary.

Restriction in refrigerant piping. Evaluate debris in distributor.

Defective expansion valve. Check expansion valve performance and replace

if necessary.

Faulty or improperly set hot-gas Open hot-gas isolation valve, if equipped. Set hot

bypass valve. gas valve to maintain 32°F suction temperature

(58 psig), or replace if necessary.

10.4. Head Pressure Too High / In Cooling Mode

The outdoor remote condenser can cause high head pressures.

Lack of air flow. Check remote outdoor condenser coil for debris.

Remote condenser blower motor

A. Overload tripped out. Reduce blower speed and reset overload.

B. Blower cycling on internal protection. Reduce blower speed.

C. Contactor faulty. Replace contactor.

D. Jumper wire missing on sub-base. Add jumper wire, refer to wire diagram.

Service valves not fully open. Fully open service valves.

Excessive pressure drop in line sets. Re-evaluate remote condenser installation section.

Note: When the outdoor remote condenser is active and the outdoor temperature is 95°F,

the normal head pressure can be as high as 300 psig.

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Whirlpool DryAire LMA1053L Specifications Page 32