Sinclair S therm Series Service Manual page 143

Trial run is to test whether the unit can run normally via preoperation. If the unit cannot run
normally, find and solve problems until the trial run is satisfactory. All inspections must meet the
requirements before performing the trial run. Trial run should follow the content and steps of the
table below:
The following procedure should be executed by experience and qualified maintenance personnel.
No.
Notice: before test, ensure that all power must be cut off, including the far- end power switch, otherwise, it may
cause casualty.
1
Ensure that the compressor of the unit is preheated for 8h.
Caution: heat the lubricating oil at least 8h in advance to prevent refrigerant from mixing with the lubricating
oil, which may cause damage to the compressor when starting up the unit.
Check whether the phase sequence of the main power supply is correct. If not, correct the phase
2
sequence firstly.
Recheck the phase sequence before start-up to avoid reverse rotation of the compressor which may damage
the unit.
Apply the universal electric meter to measure the insulation resistance between each outdoor phase
3
and earth as well as between phases.
Caution: defective earthing may cause electric shock.
No.
Cut off all temporary power supply, resume all the insurance and check the electricity for the last time.
1
Check the power supply and voltage of the control circuit; _____V must be ±10% within the range of
rated operating power.
No.
1 Check all the conditions needed to start up the unit: operation mode, required load etc.
Start up the unit, and observe the operation of compressor, electric expanding valve, fan motor and
water pump etc.
2
Note: the unit will be damaged under abnormal running state. Do not operate the unit in states of high
pressure and high current.
Others:
Estimation or suggestion on the general running situation: good, correction required
Identify the potential problem (When no problem has been pointed out, it indicates the unit is
in good condition.)
a. problem of power supply and electric control system:
b. problem of load calculation:
c. outdoor refrigerant system:
Items for
d. noise problem:
acceptance after
commissioning
e. problem of indoor and piping system:
h. other problems:
During operation, it is needed to charge for the maintenance due to non-quality problems
such as incorrect installation and maintenance.
Is the user trained as required? Please sign. Yes( ) No( )
Start up the pretest procedure
Ready to start
Start up the unit
Acceptance
139