HANKISON H Series User Manual (English)

Questions and Answers:

J
Julie GonzalezAug 22, 2025
What to do if my HANKISON Dehumidifier compressor stops due to "LOW REFRIG PRESS"?
- B
  Benjamin MedinaAug 23, 2025
  If your HANKISON Dehumidifier compressor stops due to low suction pressure, indicated by "LOW REFRIG PRESS", it could be due to several reasons. A low refrigerant charge is a possibility, so check for leaks and add refrigerant as needed. The suction pressure setting might be incorrect, so adjust the hot gas by-pass valve and check the technical data for the proper setting. The low-pressure switch setting could also be incorrect, so check and repair it. Other potential causes include a hot gas valve sticking, a faulty low-pressure transducer (PT100) needing calibration or replacement, a defective CPU or component module needing replacement, or the refrigerant compressor not unloading properly, which would require checking the unloader mechanism and replacing it if necessary.
J
Joseph KentAug 25, 2025
How to fix HANKISON Dehumidifier compressor stopped because solid state motor protector open "SSMP"?
- A
  Aimee WagnerAug 25, 2025
  If the HANKISON Dehumidifier compressor stops because the solid-state motor protector is open, indicated by "SSMP", there are several potential causes. Check the power supply for low voltage or line imbalance, and correct any issues found. If the return gas temperature is excessively high, check the liquid injection valve and refrigerant charge. A defective SSMP module or motor sensor could also be the cause, requiring checking or replacement. For the motor sensor, refer to Section 3.3 of the manual and check the sensors at room temperature; they should measure between 500-10,000 ohms.
T
Thomas HughesAug 27, 2025
What causes "LOW OIL PRESSURE" and how to fix it in HANKISON Dehumidifier?
- J
  Jasmine AndersonAug 27, 2025
  If the HANKISON Dehumidifier compressor stops because of low oil pressure, indicated by "LOW OIL PRESSURE", it could be due to a few reasons. You might have a low oil charge, so add oil. A clogged oil suction strainer could also be the problem, so clean it. Other potential causes include a worn oil pump, requiring replacement of the pump assembly, or worn compressor bearings, requiring compressor replacement. Also check for a pressure drop across the suction line filter, and replace the elements if needed. For 7-1/2 - 15 HP units, the compressor could have tripped on internal overload. Finally, ensure that you take any air load off the dryer during start-up.
D
David LeeAug 28, 2025
Why does the HANKISON Dehumidifier compressor stop because motor starter protector open "MTR STARTER"?
- N
  nicole79Aug 28, 2025
  If the HANKISON Dehumidifier compressor stops because the motor starter protector is open, indicated by "MTR STARTER", it could be due to low voltage, line imbalance, or the compressor motor drawing excess current. Check the power supply for both low voltage and line imbalance. Also, check the motor winding resistance.
S
Steven PowellAug 29, 2025
How to troubleshoot a HANKISON H Series Dehumidifier compressor that will not start?
- C
  Christy ThompsonAug 30, 2025
  If the HANKISON Dehumidifier compressor will not start, first check the main switch, fuses, and wiring to ensure there is power. Then, pull the master off/on switch out. Inspect the wiring for loose connections or faults and tighten connections as needed. If equipped, check the hot gas or liquid line solenoid valve for a burned-out holding coil. Ensure the unit is not in STANDBY mode by turning the switch to auto. Finally, if none of these solve the issue, the compressor motor may be burned out and need replacement.
M
Melinda DunnAug 31, 2025
What causes a "HIGH EVAP AIR TEMP" in my HANKISON Dehumidifier?
- J
  jessicapittmanAug 31, 2025
  If the air temperature leaving the evaporator in your HANKISON Dehumidifier is high, indicated by "HIGH EVAP AIR TEMP", several factors could be responsible. The unit might be overloaded, so check the inlet flow, pressure, and temperature to verify they are within design conditions. Insufficient cooling could also be the cause, so check the refrigeration system temperatures. A faulty temperature switch could be the issue, so measure the air temperature. Lastly, ensure there is proper air flow through the dryer by checking the inlet flow.
T
Tracy MercadoSep 1, 2025
Why is my HANKISON H Series making so much noise?
- D
  Derek BaileySep 2, 2025
  If the HANKISON Dehumidifier system is making unusual noises, it could be due to several reasons. The unit foundation might be improperly isolated, so isolate the foundation. Improper support or isolation of piping can also cause noise, so use correct piping techniques and support the piping with suitable hangers. Other potential causes include slugging due to refrigerant feed back, requiring a check of the expansion valve setting and sensor bulb, piping vibration, requiring pipe support and checking connections, hissing due to insufficient refrigerant flow, requiring refrigerant reclaim, strainer replacement and recharge with proper amount of refrigerant. Note that chattering from the hot gas by-pass valve is normal and does not affect the unit's operation.
S
Samuel BrownSep 3, 2025
Why does my HANKISON H Series compressor cycle intermittently in standby mode?
- M
  Mr. Sergio Carson MDSep 3, 2025
  If the HANKISON Dehumidifier compressor cycles intermittently in standby mode, it could be due to a leaking liquid line solenoid, a leaking hot gas valve, or leaking valves in the compressor. To resolve this, remove any obstruction or replace the liquid line solenoid valve if it's leaking. If the hot gas valve is leaking, replace it. For leaking valves in the compressor, replace the valve plate assembly.
E
Eric FernandezSep 5, 2025
What causes a HANKISON Dehumidifier compressor to not unload?
- J
  Jason JohnsonSep 5, 2025
  If the HANKISON Dehumidifier compressor will not unload, it could be due to several reasons. The unloader solenoid might be stuck, so attempt to repair it. The unloader solenoid coil could be defective, requiring replacement. The hot gas by-pass valve might be set too high or sticking, so reset or repair it. A faulty low-pressure transducer could also be the cause, so check the pressure reading and calibrate or replace the transducer.
S
Steven JohnsonSep 6, 2025
What to do if HANKISON Dehumidifier compressor will not load?
- T
  Tammy BowenSep 6, 2025
  If the HANKISON Dehumidifier compressor will not load, it could be due to the unloader solenoid being stuck open, so reset or repair it. Another potential cause is a faulty low-pressure transducer, so check the pressure reading and calibrate or replace the transducer.

HANKISON H Series Specifications

General

Brand	HANKISON
Model	H Series
Category	Dehumidifier
Language	English

Summary

General Safety Information

Receiving, Storing, Moving, Unpacking

Procedures for receiving, storing, and unpacking the dryer, including checks for loss or damage.

1.0 Description

Function

Explains how refrigerated dryers reduce moisture by cooling compressed air and separating liquid.

Operation

Details the compressed air flow through the dryer, including precooling and reheating stages.

2.0 Installation

2.1 Location

Guidance on selecting a suitable installation location based on ventilation, ambient temperature, and access.

2.2 Position in the compressed air system

Recommends placing the dryer downstream of the compressor receiver, before main distribution lines.

2.3 Mounting

Instructions for permanently mounting the dryer to a level solid floor using provided base holes.

2.4 Piping

Covers air inlet/outlet, condensate drain, and water-cooled model piping connections.

2.5 Electrical

Electrical connection requirements, including disconnect switch and wiring precautions.

2.6 Air-Cooled Models

Specific installation guidance for air-cooled models, including integral and remote condensers.

2.7 Compressor shipping spacers - 7 1/2 and 10 horsepower units only

Procedure for removing shipping spacers and installing rubber spacers to prevent compressor damage.

3.0 Operation

3.1 Start-up and Shut down Procedures

Detailed steps for pre-start-up checks, starting the dryer, and standard/maintenance shutdown.

Control Panel Functions

Explanation of the operator interface, function buttons, and display messages.

Operator Interface Display

Table detailing status, conditions, pressures, temperatures, and fault messages displayed on the operator interface.

3.2 Operating Sequence

Step-by-step description of the dryer's operational sequence from energizing to normal running or standby.

3.3 Fault Conditions

Lists and explains various fault conditions, including compressor protection and informational faults.

3.4 Light and Gauges

Describes the function of the power-on indicator, general alarm light, and air inlet pressure gauge.

3.5 Operational Check Points

A checklist of critical checks to perform after starting the dryer to ensure proper operation.

4.0 Maintenance

4.1 Separator/Filter Sleeve Replacement

Instructions on when and how to replace separator/filter sleeves, including disassembly and reassembly.

4.2 Air-Cooled Refrigerant Condensers - Special Instructions

Guidance on cleaning and maintaining air-cooled condensers, including operational deficiencies.

4.3 Water-Cooled Refrigerant Condenser - Special Instructions (Cleanable shell and tube type)

Instructions for cleaning and maintaining water-cooled condensers, including operational deficiencies.

Water-Cooled Refrigerant Condenser - Special Instructions (Continued)

Details water treatment recommendations and chemical/mechanical cleaning procedures for water-cooled condensers.

Water-Cooled Refrigerant Condenser - Special Instructions (Continued)

Covers mechanical cleaning procedures, disassembly, and reassembly of water-cooled condensers.

4.4 Condensate Drains - Pneumatically Operated

Monthly flushing and annual servicing procedures for pneumatically operated condensate drains.

4.5 Condensate drains - Electrically Operated

Monthly flushing and periodic cleaning of internal strainers for electrically operated condensate drains.

Trouble Shooting Guide

Compressor stopped because of high head pressure "HIGH REFRIG PRESS"

Identifies causes and corrective actions for compressor stopping due to high head pressure.

Compressor stopped because low suction pressure "LOW REFRIG PRESS"

Identifies causes and corrective actions for compressor stopping due to low suction pressure.

Compressor stopped because of low oil pressure "LOW OIL PRESSURE"

Identifies causes and corrective actions for compressor stopping due to low oil pressure.

Compressor stopped because solid state motor protector open "SSMP"

Identifies causes and corrective actions for compressor stopping due to solid state motor protector opening.

Compressor stopped because motor starter protector open "MTR STARTER"

Identifies causes and corrective actions for compressor stopping due to motor starter protector opening.

High air temperature leaving the evaporator "HIGH EVAP AIR TEMP" (optional)

Identifies causes and corrective actions for high evaporator air temperature.

Compressor will not start

Lists potential causes and corrective actions when the compressor fails to start.

Compressor cycles intermittently in standby mode

Identifies causes and corrective actions for intermittent compressor cycling in standby mode.

Low refrigerant head pressure

Identifies causes and corrective actions for low refrigerant head pressure.

System Noise

Identifies causes and corrective actions for various system noise issues.

Compressor will not unload

Identifies causes and corrective actions for the compressor failing to unload.

Compressor will not load

Identifies causes and corrective actions for the compressor failing to load.

Rapid Unloader Cycling

Identifies causes and corrective actions for rapid cycling of the unloader.

Cold Compressor (Cylinders and Crankcase Sweating)

Identifies causes for cold compressor sweating and potential remedies.

Compressor Flooding

Identifies causes for compressor flooding and potential remedies.

Low Crankcase Oil Level

Identifies causes and corrective actions for low crankcase oil level.

High Crankcase Temperature (should be 100°F/38°C to 130°F/55°C)

Identifies causes and corrective actions for high crankcase temperature.

High inlet air temperature to unit "HI INLET AIR TEMP" (optional)

Identifies causes and corrective actions for high inlet air temperature.

Low air temperature in evaporator "LOW EVAP AIR TEMP" (optional)

Identifies causes and corrective actions for low evaporator air temperature.

High condensate level in drains "DRAIN # HI LEVEL" (optional)

Identifies causes and corrective actions for high condensate levels in drains.

Low water pressure entering condenser (water-cooled units) "LOW WATER PRESS" (optional)

Identifies causes and corrective actions for low water pressure entering the condenser.

High pressure drop across dryer air side "CHECK SEPARATOR" (optional)

Identifies causes and corrective actions for high pressure drop across the dryer air side.

Warranty

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HANKISON H Series User Manual

Table of Contents

Questions and Answers:

HANKISON H Series Specifications

Summary

General Safety Information

Receiving, Storing, Moving, Unpacking

1.0 Description

Function

Operation

2.0 Installation

2.1 Location

2.2 Position in the compressed air system

2.3 Mounting

2.4 Piping

2.5 Electrical

2.6 Air-Cooled Models

2.7 Compressor shipping spacers - 7 1/2 and 10 horsepower units only

3.0 Operation

3.1 Start-up and Shut down Procedures

Control Panel Functions

Operator Interface Display

3.2 Operating Sequence

3.3 Fault Conditions

3.4 Light and Gauges

3.5 Operational Check Points

4.0 Maintenance

4.1 Separator/Filter Sleeve Replacement

4.2 Air-Cooled Refrigerant Condensers - Special Instructions

4.3 Water-Cooled Refrigerant Condenser - Special Instructions (Cleanable shell and tube type)

Water-Cooled Refrigerant Condenser - Special Instructions (Continued)

Water-Cooled Refrigerant Condenser - Special Instructions (Continued)

4.4 Condensate Drains - Pneumatically Operated

4.5 Condensate drains - Electrically Operated

Trouble Shooting Guide

Compressor stopped because of high head pressure "HIGH REFRIG PRESS"

Compressor stopped because low suction pressure "LOW REFRIG PRESS"

Compressor stopped because of low oil pressure "LOW OIL PRESSURE"

Compressor stopped because solid state motor protector open "SSMP"

Compressor stopped because motor starter protector open "MTR STARTER"

High air temperature leaving the evaporator "HIGH EVAP AIR TEMP" (optional)

Compressor will not start

Compressor cycles intermittently in standby mode

Low refrigerant head pressure

System Noise

Compressor will not unload

Compressor will not load

Rapid Unloader Cycling

Cold Compressor (Cylinders and Crankcase Sweating)

Compressor Flooding

Low Crankcase Oil Level

High Crankcase Temperature (should be 100°F/38°C to 130°F/55°C)

High inlet air temperature to unit "HI INLET AIR TEMP" (optional)

Low air temperature in evaporator "LOW EVAP AIR TEMP" (optional)

High condensate level in drains "DRAIN # HI LEVEL" (optional)

Low water pressure entering condenser (water-cooled units) "LOW WATER PRESS" (optional)

High pressure drop across dryer air side "CHECK SEPARATOR" (optional)

Warranty

Related product manuals