Problem Analysis; Failure Finding And Troubleshooting Table - UNTES URTP055 Instructions For Installation, Commisioning, Maintenance And Use

direct connection to a surgery room, cleaning should be carried out only if dust and dirt exist on the outer
surfaces.
The outer case should be cleaned in the following manner.
 Stop the device and take the main switch and the service switch to the off position to cut the electricity.
 Post onto the electricity panel a note stating that the device has been serviced and the electricity switch
should never be taken to the on position.
 Clean the outer case with any alcoholic solution (or any chemically equivalent solution). Cleaning should
be carried out by spraying the solution onto the device. Wipe the device dry with a soft cloth. Do not use
benzene-like solvents (acetone, oil, etc.) or corroding cleaning powders for cleaning the device. Clothes
used for cleaning should be put into a closed box and disposed with the other solid wastes of the hospital.
Lift the main power switch and the service switch to supply electricity following the completion of cleaning.

14. PROBLEM ANALYSIS

In this section, the operator will be provided with some information to understand the reason for the problem
and eliminate the problem for various types of problems. The tables have been designed to help understand,
and describe ways of solutions of, frequently encountered problems. Descriptions of reasons are generalized.
Thus the explanations herein are not model-dependent. Considering the device having the problem,
indicators and ways of solution should be examined presented in the section of the relevant problem.
Replacements and repairs to the device should be carried out by trained professionals. Do not try to carry out
these repairs yourselves if you lack sufficient information regarding the operational principles of the device.
Refer to the assistance of professionals for this purpose. Prior to any operation on the device, always cut off
the electricity and remember to post onto the panel a note stating that the device is under maintenance and
the it should never be operated.

14.1. Failure Finding and Troubleshooting Table

Problem
Device does not
operate
The unit starts to
operate and then stop
too often
The unit remains at
the low suction
temperature
The unit constantly
Reason
No power. The main switch is on. The phase
order is incorrect. Low voltage. A protection
failure. The contactor is open Compressor
failure
Failed compressor contactor. Failed
compressor. Gas loss from the cooler
Changing input voltage.
Cooling unit/heat pump, failed low pressure
Switch, gas loss from the cooler, Inner/Outer
fan does not operate
Cooling unit/heat pump, Failed high pressure
Solution
Connect the power source, Turn off the
main unit power cut switch, Check the
voltage and eliminate insufficiency,
Resetting, Check the contactor and replace
it if necessary, Check the compressor and
replace it if necessary
Check the contactor and replace it if
necessary, Check the compressor and
replace it if necessary, Check the cooler gas
amount
Check the low pressure Switches and
replace them if necessary, check the cooling
gas amount and add if necessary, Check the
fan motors,
Check the pressure Switches and replace
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