HANKISON HPRplus HPRP1000 User Manual

25
SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION
A) Water downstream of dryer 1. Residual free moisture remaining in
downstream pipelines.
2. Air bypass system is open.
3. Inlet and Outlet connections are reversed.
4. Air lines downstream of dryer are exposed
to temperatures below the dew point.
5. Excessive free moisture (bulk liquid) at dryer
inlet.
6. Condensate not being drained.
7. Dryer overloaded resulting in elevated dew
point.
8. Refrigeration system not functioning.
1. Blow out system with dry air.
2. Check valve positions.
3. Check for correct connection.
4. Insulate or heat trace air lines exposed to
low ambients or dry air to lower dew point.
5. Install separator ahead of dryer.
6. See C below.
7. See C below.
8. See C below.
B) High pressure drop across dryer 1. Excessiveairow.
2. Freezing of moisture in evaporator because
of refrigeration system fault.
3. Filter loaded with solid particulates.
1. Checkowrate.
2. See C below.
3. Replacelterelement.
C) Checkpoint faults
1. Power on light off
2. Compressor on light off
3. Alarm/Service alert light on -check
Display for active conditions
SERVICE DRYER
LOW PRESSURE
HIGH PRESSURE
NOTE: If high refrigerant pressure
occurs, switch must be manually
reset
HIGH EVAPORATOR
TEMPERATURE
(also observed as high reading on
temperature indicator)
DRAIN
COMPRESSOR
HEATER
TEMP SENSOR
1. Power failure; open circuit.
1. Compressor commanded off by manual
switch or programmed schedule.
2. Open circuit.
3. Control circuit open on high or low pressure
cutout.
1. Serviceintervalspeciedhaselapsed.
1. Hot gas bypass valve requires adjustment
2. Low on refrigerant/refrigerant leak.
1. Lack of condenser cooling.
Air-cooled - Ambient temperature too high,
cloggedcondenserns,obstructedow
across condenser, faulty fan motor or fan
control switch.
2. Water-cooled - Cooling temperature too
high,owtoolow,cloggedstrainer,faulty
water regulating valve.
1. Dryer overloaded.
2. Refrigeration system off or not cooling
sufciently.
1. Drain line restricted or frozen.
2. Drain mechanism faulty.
1. Faulty compressor contactor.
2. Faulty N.O. auxiliary contact on compressor
contactor.
1. Faulty compressor contactor.
2. Faulty N.C. auxiliary contact on compressor
contactor.
3. Faulty heater.
1. Temperature sensor or wiring to sensor
is open (only the left-most LED in the
temperature display will be illuminated).
2. Temperature sensor or wiring to sensor is
shorted (all of the LEDs in the temperature
display will be illuminated).
1. Check for power to dryer.
1. Check current command status.
2. Check power to compressor.
3. Check display for fault.
1. Perform scheduled service.
1. Contactqualiedtechnicianor
manufacturer’s service department.
1. Check air temperature 6” in front of
condenser; Clean condenser and check
forfreeairow;Checkfanandswitch
operation.
2. Check cooling medium temperature and
ow,cleanstrainer,checkvalveoperation.
1. Checkcompressedairinletow,
temperature, and pressure.
2. Check power to unit, power to compressor,
LoworHighpressurefaults.Havequalied
technician evaluate system.
1. Open drain line.
2. Check drain by pressing “Push to Test”
button on control panel. If faulty, isolate
drain. Rebuild automatic drain.
1. Check wiring and operation of contactor.
2. Check wiring and operation of auxiliary
contact.
1. Check wiring and operation of contactor.
2. Check wiring and operation of auxiliary
contact.
3. Check heater element for continuity.
1. Replace sensor or repair wiring.
2. Replace sensor or repair wiring.
NOTE: After fault correction, press reset button to clear display
TROUBLESHOOTING GUIDE

HANKISON HPRplus HPRP1000 Specifications

General

Brand	HANKISON
Model	HPRplus HPRP1000
Category	Dehumidifier
Language	English