Huawei NetCol5000-A035 - Page 156

or Engineer. Tape Settings > User Settings to change the passwords for
security after you rst entering the system.
4. If the actual server total load, relative to a single smart cooling product, is
less than 10 kW, the humidity might be relatively high. You are recommended
to install a
dehumidier.
Context
CA UTION
The crankcase heat tape starts to work when the general circuit breaker QF1 and
main control board power circuit breaker QF8 are on. Ensure that the crankcase
heat tape has been preheated for over 12 hours before starting the compressor.
Otherwise, the compressor will be damaged. Huawei will not be liable for any
consequences.
Procedure
Step 1 Switch on fan circuit breaker QF6, electric heater circuit breaker QF4,
humidier
circuit breaker QF5, condensate pump circuit breaker QF9, outdoor unit general
circuit breaker, and compressor circuit breaker QF3 in turn.
Step 2 Tap Start on the main screen, and then choose Maint > Diagnostic Mode > Enter
to enter the diagnostic mode.
Step 3 Start the electric heater on the diagnostic mode page. Check that:
CA UTION
Do not touch the electric heater surface directly to avoid empyrosis.
1. The indoor fan rotates smoothly.
2. The electric heater generates heat.
Step 4 Close the electric heater on the diagnostic mode page. Adjust the compressor
rotation speed to 3000 rpm and adjust the humidier input to 50%.
Step 5 Adjust the compressor.
1. Open valve 3 shown in Figure 5-2 (or valves 4 and 6 shown in Figure 5-3)
and charge refrigerant only from the low-pressure needle valve. Ensure that
the refrigerant is charged in small amount or charged discontinuously. The
total charging amount must meet the calculation requirements in 5.2.1
Calculation about the Charged the Refrigerant and Refrigerant Oil.
2. On the main screen, tap Run > Device Details > Compressor to read the
suction and discharge pressure. Check whether the suction and discharge
pressure of the compressor are within reasonable ranges. (Normal suction
pressure range: 0.7–1.2 MPa; normal discharge pressure range: listed in Table
5-3.)
NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm Width) 5 Power-On Commissioning
Issue 17 (2020-10-22) Copyright © Huawei Technologies Co., Ltd. 146