Great Lakes Air Products ERF SERIES Instrukcja obsługi - Strona 7

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TROUBLESHOOTING

Sec Symptom

Water downstream of

dryer.

Drain System Failure

with no condensate

discharge on test

initiation.

Drain System Failure

with continuous

condensate or air

discharge.

High pressure drop

across dryer

Power on indicator

does not illuminate

Refrigeration

compressor cycles on

and off

Great Lakes Air Products ERF Series Refrigeration Dryers

Effective for equipment manufactured 01/01/2010

Possible Cause(s)

1. Residual free moisture

remaining in downstream

piping

2. Air By-pass system is

open

3. Ambient temperature

surrounding downstream

piping is below the dryer's

dewpoint.

4. Free water (liquid) is

entering the dryer

5. Condensate is not being

drained

6. Dryer is overloaded

resulting in high dewpoint

7. Refrigeration system is not

functioning.

8. Suction pressure not in

operating range

1. Drain strainer is clogged

2. Solenoid valve or

electronic timer failure

1. Solenoid valve diaphragm

rupture or orifice path

blocked open

1. Inlet flow exceeds

maximum capacity

2. Freezing of moisture in

evaporator is restricting

inlet air flow

Refrigeration System Fault

1. Power failure, Line fuses

blown, or disconnect

open.

1. Ambient Conditions are

above or below minimum

or maximum ranges.

2. Air-Cooled Units,

Dirty condenser

3. Water-Cooled Units,

High fluid temperature or

low fluid flow.

Page 7 of 8

Corrective Action

Drain low spots in system and purge with

dry air

Verify valve positions and correct valve

positions

Insulate and/or heat trace piping exposed

to low ambient temperatures or dry air to a

lower dewpoint.

Dryers are designed to handle saturated

air not condensed liquid. Install a separator

and coalescing filter upstream of dryer.

See section B

See capacity charts to determine correct

load

See section E

Contact Service Department for authorized

technician to perform adjustments.

Depressurize dryer and replace or clean

drain strainer.

Replace drain solenoid and or timer

assembly

Clean or replace internal diaphragm

assembly.

Check inlet flow vs. rated capacity

If refrigerant suction pressure is out of

standard operating range, contact a

qualified refrigeration service technician or

the manufacturers service department.

Have an electrician check electrical feed

and connection integrity.

Verify range and rectify ambient

conditions.

Clean condenser as per required

maintenance.

Check fluid temperature, bring in

range and check for free fluid flow

through condenser. If problem

persists contact a qualified

refrigeration service technician or

the manufacturers service

department.