Brisbane Australia site
challenge to reach and maintain setpoint
Daikin VRV Heat Pump
CoolTimes
Site: Stuartholme School
The system: Daikin VRV Heat Pump
Stuartholme School is an all-girls private high school located in Brisbane, Queensland, Australia.
The site consists mainly of Daikin VRV connected to various types of indoor units.
Identify why the entire building was struggling to maintain setpoint and see how HVAC Remote service tools could simplify the setup.
CoolAutomation’s smart HVAC Predictive Maintenance tool
By using the professional application and its advanced HVAC diagnostic tools section, we were quickly able to identify an extremely high current reading from the fan driver PCB. This was limiting the machine’s frequency, yet no fault or protection state was activated.
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1
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Schedule a site visit |
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2
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Travel to site |
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3
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Connect the service tool and wait on-site for several hours to gather data |
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4
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Analyze the service data |
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5
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Potentially have to share the data with a senior technician to analyze |
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6
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Locate the fault |
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7
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Order the required parts |
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8
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Return to the site and replace parts |
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9
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Connect the service tool and re-analyze the data to confirm correct operation |
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Total of 11 working hours |
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1
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Use CoolAutomation Professional Application Suite, remotely monitor the site, analyze the historical data and see the machine operation prior to fault condition |
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2
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Identify the fault |
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3
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Travel to the site with the correct parts and replace them |
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4
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Monitor the site remotely with HVAC service tools, to confirm correct operation |
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Total of 2 working hours |
clearly shows the fan speed at 0 and yet still
drawing 128amps. The outdoor unit continues
to run at a reduced capacity with no protection
state activated nor fault code present.
can see a rotation speed of 710 and a realistic
current draw of 8amps.
The result is
HVAC Technician
energy saving
before anyone even notices there is an issue
Benefits
Reduced service technician working hours
Reduced costs with no initial call-out fee
Enhanced service - one service call vs. two traditionally
System longevity - identifying problematic faults quicker, ensuring no long-term damage to the system
Maintain comfort for pupils and staff - less system downtime
Save on system energy consumption
CoolTimes Services have introduced us to CoolAutomation’s solutions. On countless occasions it has saved the school on both reactive call outs and labour, minimising time by utilising their unique cloud based solution, allowing senior technicians to diagnose the Daikin VRV equipment remotely and efficiently, ensuring minimal downtime of the equipment.
In addition to the service diagnostics, I’ve been able to regain control of the HVAC with the help of CoolAutomation’s air conditioning management platform. With the help of CoolTimes we’ve been able to set schedules, restrict operation at the wall controller, set auto heat/cool logic change over rules and see real time energy consumption.
Implementing these control strategies has already seen an energy and maintenance downturn in costs and presumably see equipment lifespan increased.