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Zamil PDS Series - User Manual

Zamil PDS Series
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DOUBLE SKIN PACKAGED AIR CONDITIONERS
'PDS' SERIES
PL-OM-PDS-05-1M-E
INSTALLATION,
OPERATION
&
MAINTENANCE
MANUAL

Table of Contents

Questions and Answers

  • A
    Anna TaylorAug 11, 2025
    Why Zamil Air Conditioner compressor hums but trips on overload protector?
    • B
      Bobby JenkinsAug 11, 2025
      If the Zamil Air Conditioner compressor hums but trips on the overload protector, here are a few potential causes: * The unit might be improperly wired. Check the wiring against the diagram. * There could be low voltage to the unit. Determine the reason and correct it. * The compressor motor may have an open or shorted winding. Replace the compressor. * There might be internal mechanical trouble in the compressor. Replace the compressor. * Liquid refrigerant could be present in the compressor. Check the crankcase heater. * High discharge pressure could be the issue, indicating unequalized pressure in the system.
  • K
    Kimberly EricksonAug 16, 2025
    Why is the space temperature too high with my Zamil PDS?
    • K
      Kathy BuchananAug 16, 2025
      If the space temperature is too high when using your Zamil Air Conditioner, consider the following: * The control setting might be too high. Reset the control to a lower setting. * The expansion valve could be too small. Use a larger valve to increase refrigerant flow. * The cooling coils might be too small for the space. Add surface area or replace them with larger coils. * There may be inadequate air circulation. Improve air movement within the space.
  • B
    Brian MorenoAug 20, 2025
    What causes a Zamil PDS Air Conditioner suction line to be frosted or sweating?
    • J
      Jeffrey WalkerAug 21, 2025
      If the suction line of your Zamil Air Conditioner is frosted or sweating, it could be due to: * The expansion valve passing excess refrigerant or being oversized. Re-adjust the valve or replace it with a smaller one. * The expansion valve being stuck open. Clean the valve of foreign particles, and replace it if necessary. * The evaporator fan not running. Determine the reason and correct it. * An overcharge of refrigerant. Correct the charge to the proper level.
  • S
    Stephen ValenzuelaAug 26, 2025
    Why is the liquid line frosted or sweating on my Zamil PDS Air Conditioner?
    • D
      David ChavezAug 26, 2025
      If the liquid line of your Zamil Air Conditioner is frosted or sweating, it could indicate: * A restriction in the dehydrator or strainer. Replace the affected part. * The liquid shut-off valve being partially closed. Open the valve fully.
  • S
    Stephanie WhitakerOct 31, 2025
    How to troubleshoot Zamil PDS compressor that will not start and has no hum?
    • J
      Jamie ContrerasOct 31, 2025
      If the Zamil Air Conditioner compressor won't start and there's no humming sound, here are several potential causes and solutions: * The line disconnect switch might be open. Close the start or disconnect switch. * A fuse may be removed or blown. Replace the fuse. * The overload protector could be tripped. Refer to the electrical section for guidance. * The control might be stuck in the open position. Repair or replace the control. * The control could be off due to a cold location. Relocate the control. * The wiring may be improper or loose. Check the wiring against the diagram. * The thermostat may be defective or improperly installed. Replace or relocate it. * The control circuit could be open. Trace the control circuit with the wiring diagram and repair it. * There mi...
  • J
    Jesse JonesNov 5, 2025
    What to do if Zamil Air Conditioner compressor starts and runs, but short cycles on overload protector?
    • K
      Kara SmithNov 5, 2025
      If your Zamil Air Conditioner compressor starts and runs but short cycles on the overload protector, consider these possibilities: 1. Additional current may be passing through the overload protector. Check the wiring diagram and look for added fan motors, pumps, etc., connected to the wrong side of the protector. 2. There might be low voltage to the unit (or unbalanced voltage if it's a three-phase system). Determine the reason and correct it. 3. The overload protector itself could be defective. Check the current and replace the protector if necessary. 4. Excessive discharge pressure may be the issue. Check airflow across the condenser coil and look for restrictions in the refrigeration system. 5. The suction pressure might be too high. Check for misapplication and consider using a s...

Summary

Model Decoding

Unit Dimensions

Rigging Instructions

Weight Distribution

Details load distribution at various points for different unit models and configurations.

Installation Instructions

General Installation Guidelines

Start-Up Inspection and Check List

Pre-operation checklist to ensure all components are correctly installed and set.

Belt Tension Testing Procedure

Step-by-step guide for measuring and adjusting belt tension.

Location of Unit

Operational Start-Up Procedure

Steps for starting the unit and performing initial operational checks.

Wiring Requirements

Typical Schematic Wiring Diagram

Typical Schematic Wiring Diagram (Dual Compressor Units)

Economizer Connection

Electrical

Electric Power Supply

Requirements for the unit's electric power supply, including voltage and amperage.

Voltage Monitor

Device that protects motors from voltage faults.

Unbalanced Voltage

Explanation and calculation of voltage unbalance and its effects on motors.

Electronic Thermostats

Crankcase Heaters

Lube Oil Protection Control

Operation and settings of the oil pressure protection control.

Controls and Sequence of Operation

Refrigeration

Compressor

Details on compressors, their benefits, and testing procedures.

Source of Contamination

Pump Down Control

Compressor Burn Out Procedure

Steps for cleaning a system after a compressor burnout.

High Pressure Switch

Function, testing, and common causes of high pressure switch tripping.

Low Pressure Switch

Trouble Shooting Chart

Compressor Issues

Troubleshooting for compressor not starting, humming, or short cycling.

Unit Operation and Pressure Issues

Suction Pressure and Noise Issues

Temperature and Airflow Issues

Preventive Maintenance Schedule

Zamil PDS Series Specifications

General IconGeneral
BrandZamil
ModelPDS Series
CategoryAir Conditioner
LanguageEnglish

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