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List of Checks to Perform Possible Malfunctions PASS/FAIL
Before Test Run
Only perform test run AFTER you have completed the following steps:
• Electrical Safety Checks – Confirm that the electrical system is safe and operating properly.
• Gas Leak Checks – Check all refrigerant piping connections/valves and confirm that the system
is not leaking.
• Confirm that gas and liquid (high and low pressure) valves are fully open.
3
Post Installation Checks
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mrcool.com
Is the main body installed securely?
The unit could fall down, vibrate or
produce noise
Did you conduct a water leakage test? Cooling capacity could become
inadequate
Is the unit well insulated from heat?
Condensate/water droplets may
occur
Does water drain properly from drain
hose?
Condensate/water droplets may
occur
Is the voltage consistent with the
specifications stated on the nameplate?
The unit may fail or its components
could get burned.
Are the wires, piping, and valves
installed correctly?
The unit could fail or its components
may ignite.
Has the unit been safely grounded?
Risk of electrical leakage.
Do the wire specifications comply with
the requirements?
The unit could fail or its components
may ignite.
Are there any obstacles blocking the air
inlet or outlets of the units?
Cooling capacity may become
unsatisfactory.
Have you recorded the length of
refrigerant pipe and the refrigerant
charge amount?
The refrigerant charging amount
cannot be controlled.
Is the panel mounted securely? It could cause an air leak, vibration, and
noise.
Are there any cracks in the air return or
supply pipe?
It could cause an air leak, vibration, and
condensation.
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