Test Run - Gree GRS-CQ4.0Pd/NhG3-E Owner's Manual

MONOBLOC TYPE

18.2 Test run

Test run is testing whether the unit can run normally via preoperation. If the unit cannot run normally, find and
solve problems until the test run is satisfactory. All inspections must meet the requirements before performing the
test run. Test run should follow the content and steps of the table below:
The following procedure should be executed by experience and qualified maintenance men.
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 sequence
2
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 and earth
3
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, modify
Identify the potential problem (nothing means the installation and commissioning are in
accordance with the requirements.)
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
e. problem of indoor and piping system:
commissioning
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
49
Air-to-water Heat Pump