HVAC VRF technician

Tanqeeb; Muscat; On-site; OMR 9,000 - 15,000; Full time

Job summary

TANQUEEB is seeking an experienced HVAC/VRF Technician to operate, maintain and repair hotel air-conditioning systems. The role requires diagnosing VRF/VRV faults and keeping downtime to a minimum.

The technician will handle troubleshooting, refrigerant work, electrical diagnostics and preventive maintenance across guest rooms and plant rooms.

Qualifications

• Minimum 5 years of hands-on HVAC experience.
• Maximum 3 lines may be truncated in this field.
• Minimum 3 years VRF/VRV experience.
• Experience maintaining commercial buildings, hotels, hospitals, malls or similar facilities.
• Must have diagnosed and repaired VRF outdoor units.

Responsibilities

• Operate, inspect, service and maintain VRF/VRV systems.
• Troubleshoot VRF outdoor units, indoor units and refrigerant networks.
• Diagnose system error codes using service manuals and diagnostic tools.
• Carry out VRF commissioning and testing after repairs.

Skills

VRF error-code diagnosis

PCB troubleshooting

Compressor diagnosis

Inverter troubleshooting

EEV troubleshooting

Sensor testing

Electrical troubleshooting

Refrigerant charging

Refrigerant recovery

Leak detection

Nitrogen pressure testing

Vacuuming

Copper brazing

Control-wiring troubleshooting

Indoor/outdoor communication diagnosis

Education

High School Diploma or equivalent; HVAC/R preferred

EPA Section 608 Universal Certification

Tools

Manufacturer diagnostic equipment

Job description

• Job Summary

  We are seeking an experienced HVAC / VRF Technician to be responsible for the operation, maintenance, troubleshooting and repair of the hotel’s complete air-conditioning systems.

  The ideal candidate must have strong hands-on experience with VRF/VRV systems and should be capable of independently diagnosing electrical, electronic, refrigerant and mechanical faults.

  This is not only a preventive-maintenance position. The technician must be able to identify the actual cause of HVAC failures, repair equipment where practical, replace defective components and return systems to normal operation with minimum downtime.

  Main Responsibilities

  VRF / VRV Systems

  • Operate, inspect, service and maintain hotel VRF/VRV systems.

  • Troubleshoot VRF outdoor units, indoor units and complete refrigerant networks.

  • Diagnose system error codes using manufacturer service manuals and diagnostic tools.

  • Diagnose and repair:

    • PCB/control-board faults

    • Inverter-board faults

    • Compressor faults

    • Fan motors

    • Outdoor fan motors

    • Electronic Expansion Valves (EEVs)

    • Solenoid valves

    • Pressure sensors

    • Temperature sensors / thermistors

    • Communication faults between indoor and outdoor units

    • Power-supply and control-wiring faults

    • Refrigerant-related faults

  • Determine whether a component should be repaired or replaced.

  • Replace outdoor-unit and indoor-unit components when required.

  • Carry out proper VRF commissioning and testing following repairs.

  Refrigeration Work

  • Identify refrigerant leaks accurately.

  • Perform nitrogen pressure testing.

  • Perform vacuuming using a proper vacuum pump and micron gauge.

  • Charge refrigerant according to manufacturer specifications.

  • Recover refrigerant safely when necessary.

  • Carry out copper pipe brazing.

  • Repair or replace damaged refrigerant piping.

  • Understand refrigerant pipe sizing and VRF branch joints.

  • Check system operating pressures and temperatures.

  • Diagnose undercharge, overcharge, restrictions and refrigerant-flow problems.

  Electrical & Electronic Troubleshooting

  The technician must be comfortable using:

  • Digital multimeter

  • Clamp meter

  • Megger / insulation resistance tester

  • Temperature probes

  • Refrigerant gauges

  • Vacuum gauge

  • Manufacturer diagnostic equipment

  Must be capable of troubleshooting:

  • Three-phase and single-phase electrical systems

  • Contactors and relays

  • Circuit breakers

  • Control transformers

  • Sensors

  • Communication wiring

  • Motors

  • Inverter drives

  • PCB boards

  • Compressor electrical faults

  • Earth leakage and insulation faults

  The technician should be able to read and understand:

  • Electrical wiring diagrams

  • HVAC control diagrams

  • VRF piping diagrams

  • Manufacturer service manuals

  Hotel HVAC Maintenance

  Carry out preventive and corrective maintenance for:

  • VRF indoor units

  • VRF outdoor units

  • Ducted split AC units

  • Split AC units

  • Cassette units

  • Fresh Air Units where applicable

  • Exhaust and ventilation fans

  • Kitchen ventilation systems

  • Toilet exhaust systems

  • AHUs/FAHUs where installed

  Responsibilities include:

  • Cleaning filters

  • Cleaning evaporator and condenser coils

  • Cleaning drain trays and drain lines

  • Checking fan motors and bearings

  • Checking refrigerant conditions

  • Checking electrical connections

  • Measuring operating current

  • Checking compressors

  • Checking temperatures and pressures

  • Preventing condensate leakage

  • Preventing abnormal noise and vibration

  Guest Room HVAC

  The technician will be expected to respond quickly to guest-room complaints including:

  • Room not cooling

  • Poor airflow

  • AC water leakage

  • Excessive noise

  • AC turning on/off unexpectedly

  • Temperature-control problems

  • Thermostat problems

  • Unusual smells

  • Communication/error codes

  Guest-room faults must be diagnosed and repaired with minimum disturbance to hotel guests.

  Preventive Maintenance

  Prepare and follow a preventive-maintenance schedule covering all hotel HVAC equipment.

  Maintain records for:

  • Equipment model and serial numbers

  • Service dates

  • Refrigerant quantities

  • Compressor condition

  • PCB replacements

  • Fault history

  • Repeated failures

  • Spare-parts consumption

  Report equipment that is approaching the end of its economical service life and recommend repair or replacement.

  Spare Parts & Inventory

  Maintain a basic stock of critical HVAC spare parts including, where appropriate:

  • Sensors

  • Thermistors

  • Fan motors

  • Capacitors

  • Contactors

  • Relays

  • Drain pumps

  • PCB boards

  • EEV components

  • Filters

  • Refrigerant

  • Copper fittings

  • Electrical components

  The technician should advise hotel management which critical VRF spare parts should be kept on-site to reduce downtime.

  Required Experience

  • Minimum 5 years of hands-on HVAC experience.

  • Minimum 3 years of direct VRF/VRV experience.

  • Strong troubleshooting experience, not only installation or preventive maintenance.

  • Experience maintaining commercial buildings, hotels, hospitals, malls or similar facilities.

  • Must have personally diagnosed and repaired VRF outdoor units.

  Experience with one or more major VRF brands is required, preferably:

  • Gree

  • Daikin

  • Mitsubishi Electric

  • LG

  • Carrier

  • Toshiba

  • Samsung

  • Midea

  Essential Technical Skills

  Candidate must be able to independently perform:

  • VRF error-code diagnosis

  • PCB troubleshooting

  • Compressor diagnosis

  • Inverter troubleshooting

  • EEV troubleshooting

  • Sensor testing

  • Electrical troubleshooting

  • Refrigerant charging

  • Refrigerant recovery

  • Leak detection

  • Nitrogen pressure testing

  • Vacuuming

  • Copper brazing

  • Control-wiring troubleshooting

  • Indoor/outdoor communication diagnosis

Desired Candidate Profile

• Possess a High School Diploma or equivalent; vocational training or associate's degree in HVAC/R preferred.
• Hold EPA Section 608 Universal Certification, demonstrating proficiency in refrigerant handling.
• Have at least 3-5 years of hands-on experience specifically with VRF system installation, maintenance, and repair.
• Demonstrate advanced technical skills in electrical, mechanical, and control systems specific to VRF technology.