As an efficient, energy-saving humidification solution, wet-fiber humidifiers are widely deployed in environments with high 

humidity requirements—including data centers, textile workshops, printing facilities, greenhouses, and large office spaces. 

Their stable operation is critical for maintaining production quality, ensuring equipment safety, and enhancing environmental 

comfort. However, like all precision machinery, regular maintenance and upkeep are essential to ensure sustained performance 

and extended service life. This manual provides a systematic daily maintenance process and common troubleshooting guide 

to help users scientifically manage equipment, avoid unplanned downtime, and effectively control operational costs.

Part One: Daily Maintenance Process—Prevention is Better than Cure

Standardized and consistent daily maintenance is the foundation for ensuring the efficient and stable operation of wet-film 

humidifiers. Below are key maintenance points for critical components.

I. Cleaning and Replacement of the Humidification Membrane

The humidification membrane (also known as the evaporative curtain or honeycomb filter media) is the core evaporation 

component of the humidifier. Its cleanliness and integrity directly determine humidification efficiency and air quality.

Routine Cleaning:

• Frequency: Recommended every 2-4 weeks, depending on water hardness and environmental dust levels.

Steps:

• Turn off power and water supply, then drain the water tank.

• Carefully remove the wet membrane. Rinse vertically from top to bottom along the honeycomb structure using low-pressure

  water (e.g., a hose) to remove scale, dust, and microbial films.

• For stubborn scale, soak in a specialized mild acidic cleaner (e.g., diluted food-grade citric acid solution), then rinse thoroughly.

• Caution: Never use hard brushes for vigorous scrubbing, as this may damage the membrane's fiber structure; avoid highly

  corrosive chemicals.

Regular Replacement:

• Frequency: Typically every 1-2 years, or immediately replace if any of the following occur:

• Severe deformation, collapse, or damage to the humidification membrane.

• Significantly reduced humidification capacity compared to initial levels after thorough cleaning.

• Severe surface calcification preventing restoration of permeability through cleaning.

• Persistent, unremovable odors develop.

• Key Points: Use original or specified replacement wet membranes to ensure matching dimensions, thickness, and evaporation

  performance.

II. Descaling and Maintenance of Water Circulation Systems

The water system—comprising the water tank, pump, supply lines, and water level controller—is a high-risk area for malfunctions, 

especially in hard water regions.

Water Tank and Line Cleaning:

• Frequency: Thoroughly clean every 1-3 months.

• Procedure: Drain all water, remove sediment (silt, scale, algae) from tank bottom. Soak and circulate with mild cleaner mentioned

  earlier, then thoroughly rinse. Inspect all pipe connections for aging or blockages.

Water Pump Inspection:

• Frequency: Monthly routine checks.

• Key Points: Listen for smooth operation without abnormal noise; verify secure wiring connections; observe normal head and

  flow rate (assess by uniformity of water distribution on the wet membrane).

Water Level Control & Drainage:

• Daily check float valve or electronic water level sensor responsiveness to maintain water within set range—neither too low

  (causing pump dry-running) nor overflowing.

• Overflow & Drainage: Ensure automatic overflow outlet and drain valve remain unobstructed. Periodically execute forced

  drainage procedures (if applicable) to discharge high-mineral-content water and delay scaling.

Water Treatment Recommendations:

• Where feasible, equip the unit with a water softener or use reverse osmosis (RO) purified water to significantly reduce scale

  formation at its source.

III. Fan and Electrical System Inspection

Fan Maintenance:

• Cleaning: Quarterly remove dust from fan blades and air inlets to maintain consistent airflow.

• Inspection: Verify secure fan mounting and monitor for abnormal vibration or noise during operation. Periodically replenish

  or replace bearing lubricant (if applicable).

Electrical Safety:

• Regularly inspect power cables and control circuits for damage or aging.

• Clean dust from electrical control cabinets and tighten all terminal connections.

• Ensure proper equipment grounding.

IV. Establish Maintenance Schedule

Part Two: Troubleshooting Common Issues—Quick Diagnosis and Solutions

Even with proper maintenance, equipment may encounter problems during prolonged operation. 

Below are preliminary troubleshooting approaches for several common faults.

Issue 1: Reduced Humidification or No Humidification

Possible Causes:

• Clogged or scaled humidification pads: Reduced evaporation area, impaired air/water permeability.

• Poor water circulation: Pump failure, clogged filter, blocked supply lines, or low water level.

• Insufficient airflow: Fan malfunction, clogged air filter, obstructed ductwork reducing air velocity through the humidification pad.

• Inaccurate or improperly set humidity sensor: Causing the control system to falsely indicate target humidity has been reached.

Troubleshooting Recommendations:

• Inspect and clean or replace the humidification pad.

• Check water tank level, pump operation, and pipeline integrity.

• Verify fan operation; clean air inlets and ducts before/after the humidification pad.

• Calibrate or inspect humidity sensor; review controller settings.

Issue 2: Equipment Leakage

Possible Causes:

• Damaged water tank or pipe connections: Loose joints, deteriorated seals, cracked tank.

• Uncontrolled water level: Float valve stuck, electronic water level sensor malfunction causing excessive refill overflow.

• Drain valve failure: Normally closed valve not sealing properly or normally open valve clogged leading to backflow.

• Uneven water distribution on humidification pads: Localized over-watering where droplets escape or drip before

  complete evaporation.

Troubleshooting Recommendations:

• Immediately shut off water and power supply to locate the specific leak point.

• Inspect and repair/replace damaged water tanks, pipes, fittings, or seals.

• Service water level control devices to ensure responsive and accurate operation.

• Adjust the water distribution system (e.g., water distributor) to ensure uniform wetting of the humidification membrane.

Issue 3: Odor or White Dust Generation

Possible Causes:

• Microbial Growth: Prolonged moisture in the water tank or wet membrane without timely cleaning fosters bacteria and mold,

  producing musty or unpleasant odors.

• Airborne Scale Particles: Hard water scale accumulating on the wet membrane cracks when air-dried, dispersing into the air

  as “white powder” via airflow.

Troubleshooting Recommendations:

• Thoroughly clean and disinfect the water tank, humidification membrane, and entire water system. Consider installing

  ultraviolet (UV) sterilization lamps.

• Increase routine cleaning frequency and consider using softened or purified water to fundamentally reduce scale buildup.

Issue 4: Abnormally Increased Noise

Possible Causes:

• Fan Noise: Bearing damage due to oil deficiency, fan blade deformation, loose mounting screws, or foreign objects inside.

• Pump Noise: Pump cavitation (water shortage), bearing wear, internal scale/debris.

• Resonance Noise: Unstable equipment installation, loose internal components.

Troubleshooting Recommendations:

• Identify noise source (fan or pump end).

• Tighten all mechanical components; inspect and clean fan blades and pump.

• Ensure adequate pump water intake; purge air.

Fault 5: Controller Alarm or Equipment Failure to Start

Possible Causes:

• Power issues: Power outage, circuit breaker tripped, unstable voltage.

• Protection device triggered: Low water protection, overflow protection, fan overload protection, etc.

• Sensor failure: Water level sensor, humidity sensor damaged or circuit disconnected.

• Controller malfunction.

Troubleshooting Recommendations:

• Verify normal power supply.

• Check control panel alarm codes and consult the manual to determine the cause of protection (e.g., check for water

  shortage, clean overflow tray).

• Inspect all sensor connections for integrity.

• After ruling out peripheral issues, consider repairing or replacing the control unit.

Conclusion

Implementing proactive preventive maintenance for wet-membrane humidifiers is far more economical and efficient than reacting 

to failures. By establishing and strictly adhering to the daily maintenance procedures outlined in this manual, users can significantly 

enhance equipment reliability and stability, maximize service life, and ensure consistently superior humidification performance. 

Always thoroughly review the original manufacturer's manual before operation. Strictly follow safety protocols and disconnect 

power before performing any maintenance or troubleshooting. For complex electrical or mechanical issues, contact qualified 

technical personnel.