Zamil CX300 - User Manual

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INSTALLATION,

OPERATION

&

MAINTENANCE

MANUAL

AIR COOLED CONDENSING UNITS

CX SERIES (CX150 - CX360)

Part Number: 800-213-58 (Rev.-02)

Questions and Answers

M
Monica TateAug 12, 2025
What to do if Zamil Air Conditioner compressor will not start, hums but trips on overload protector?
- S
  Samuel SmithAug 12, 2025
  If your Zamil Air Conditioner compressor hums but trips on the overload protector, the following could be the cause: * **Improperly wired:** Check the wiring against the diagram. * **Low voltage to unit:** Determine the reason and correct it. * **Starting capacitor defective:** Determine the reason and replace it. * **Relay failing to close:** Determine the reason and correct it; replace if necessary. * **Compressor motor has a winding open or shorted:** Replace the compressor. * **Internal mechanical trouble in compressor:** Replace the compressor. * **Liquid refrigerant in compressor:** Check the crank case heater. * **High discharge pressure:** Unequilized pressure in the system.
A
Austin WilsonAug 17, 2025
Why does my Zamil Air Conditioner unit operate continuously?
- N
  Nicholas BuckleyAug 17, 2025
  If your Zamil Air Conditioner operates continuously, here are some potential causes and solutions: * **Shortage of refrigerant:** Fix the leak and add refrigerant. * **Control contacts stuck or frozen closed:** Clean the contacts or replace the control. * **Refrigerated or air-conditioned space has excessive load or poor insulation:** Determine the fault and correct it. * **System inadequate to handle:** Replace with a larger system. * **Evaporator coil iced:** Defrost the coil. * **Restriction in the refrigeration system:** Determine the location and remove the restriction. * **Dirty condenser:** Clean the condenser. * **Filter dirty:** Clean or replace the filter.
K
kevin68Aug 21, 2025
Why is the evaporator icing up in my Zamil Air Conditioner?
- A
  Alan SantiagoAug 22, 2025
  If the evaporator in your Zamil Air Conditioner is icing up, consider the following possible causes and solutions: * **Restricted airflow:** Check for dirt or lint on the coil. * **Dirty air filter:** Clean or replace the air filter periodically. * **Short of refrigerant:** Check the system pressure, take a superheat reading, and add refrigerant as needed. * **Low air volume:** Check for a dirty air filter or loose belt. * **Restricted distributor tube:** Check for a warm distributor tube. * **Restricted liquid line/low liquid line pressure:** Check for restrictions in the lines and improve liquid line pressure by proper charging or installing a fan cycling switch, etc.
T
Tracy EspinozaAug 26, 2025
What causes my Zamil Air Conditioner unit to run OK, but short cycles frequently?
- R
  ronald93Aug 26, 2025
  If your Zamil Air Conditioner unit runs okay but short cycles frequently, here’s what might be happening: * **Overload protector:** Check the cause. * **Thermostat:** If the differential is set too close, widen it. * **High pressure cut-out due to:** * Insufficient air: Check airflow to the condenser and correct it. * Overcharge: Reduce the refrigerant charge. * Air in system: Purge the system. * **Low pressure cut-out due to:** * Undercharge: Fix any leaks and add refrigerant. * Restriction in expansion device: Replace the device.
H
Hayden LopezAug 30, 2025
Why Zamil Air Conditioner compressor starts, but does not switch off the start winding?
- T
  Toni PriceAug 30, 2025
  If your Zamil Air Conditioner compressor starts but does not switch off the start winding, here are potential causes: * **Improperly wired:** Check the wiring against the diagram. * **Low voltage to unit:** Determine the reason and correct it. * **Relay failing to open:** Determine the reason and correct it; replace if necessary. * **Run capacitor defective:** Determine the reason and replace it. * **Excessively high discharge pressure:** Check the discharge shut off valve; there may be a possible overcharge, or insufficient cooling on the condenser. * **Compressor motor has a winding open or shorted:** Replace the compressor. * **Internal mechanical trouble in compressor stuck up or frozen:** Replace the compressor.
S
snydersusanNov 3, 2025
How to fix Zamil Air Conditioner compressor that will not start, no hum?
- R
  Richard SullivanNov 3, 2025
  If your Zamil Air Conditioner compressor won't start and there's no humming sound, here are several potential causes and solutions: * **Line disconnect switch open:** Close the start or disconnect switch. * **Fuse removed or blown:** Replace the fuse. * **Overload protector tripped:** Refer to the electrical section for guidance. * **Control stuck in open position:** Repair or replace the control. * **Control off due to cold location:** Relocate the control. * **Wiring improper or loose:** Check the wiring against the diagram. * **Thermostat defective or improperly installed:** Replace or relocate the thermostat. * **Control circuit open:** Trace the control circuit with the wiring diagram and repair it. * **Burned/open circuit motor winding:** Replace the compressor wit...
M
Maria ShepherdNov 7, 2025
Why does my Zamil Air Conditioner compressor start and run, but short cycles on overload protector?
- B
  Bethany CollinsNov 7, 2025
  If the compressor in your Zamil Air Conditioner starts and runs but short cycles on the overload protector, consider these possibilities: 1. **Additional current passing through overload protector:** Check the wiring diagram and inspect for added fan motors or pumps connected to the wrong side of the protector. 2. **Low voltage to unit (or unbalanced if three phase):** Determine the reason and correct it. 3. **Overload protector defective:** Check the current and replace the protector if necessary. 4. **Run capacitor defective:** Determine the reason and replace it. 5. **Excessive discharge pressure:** Check airflow across the condenser coil and look for restrictions in the refrigeration system. 6. **Suction pressure too high:** Check for the possibility of misapplication and consid...

Summary

Safety and Warranty Information

Safety Issues and Warnings

Critical safety warnings, cautions, and hazard identifications for user protection.

Installation Procedures and Clearances

Rigging and Mounting Instructions

Rigging Personnel Guidance

Specific instructions and precautions for riggers handling the unit during installation.

Refrigerant System Connections

Leak Testing and Refrigerant Charging

Leak Test Procedure

Methods for detecting refrigerant leaks using electronic detectors or soap bubbles.

Refrigerant Charging Steps

Electrical Connections and Wiring

Power and Control Wiring

Schematic Wiring Diagram - CX150 Single Compressor Units

CX150 Single Compressor Wiring Diagrams and Legend

Schematic Wiring Diagrams - CX180-CX220 Dual Compressor Units

Wiring Diagrams and Options - CX180-CX220 Dual Compressor

Schematic Wiring Diagrams - CX240-CX360 Dual Compressor Units

Wiring Diagrams and Options - CX240-CX360 Dual Compressor

Operation and Maintenance Overview

Pre-Startup Inspection Checklist

Covers essential inspection points before system operation initiation.

Preventive Maintenance Schedule

Troubleshooting Chart - Compressor and Unit Operation

Troubleshooting Chart - System Performance

Parts List by Model Number

Zamil CX300 Specifications

General

Brand	Zamil
Model	CX300
Category	Air Conditioner
Language	English

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