GREE GMV5 HR HEAT RECOVERY UNITS
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Measure the resistance to earth of each wiring terminal. The value should be 10 MΩ. If not, the
compressor has an internal fault.
Step 3:
Check the solenoid valves of the system, include electric expansion valves, oil return valves, and oil
balance valves. Refer to the preceding section for the test method.
Step 4:
Check the IPM module. Refer to the preceding section for the test method.
2.2 Compressor Replacement (GMV-Q120WM/B-F(U))
Step 1: Disconnect power supply.
Turn off the power switch of the ODUs and disconnect the line of the power supply and the power
line of the ODUs. Meanwhile, cover the power line with tape for insulation and put a warning sign beside
the power switch to prevent electric shock.
Step 2: Clear electric parts (do not need to disassemble the electric box).
Before removing compressors’ lines, temperature sensors, and electric heaters, mark them so that
you will reconnect them in a correct manner after clearing. The removed electric box must be covered
and protected from wind and sun.
For GMV5 HR series, only GMV-Q120WM/B-F(U) units are configured with the left electric box,
which contains mainly the drive of the compressor E405DHD-38A2YG. After the box is removed, take
care with the removal of electric parts’ lines. DO NOT pull the lines with excessive force; or they may be
broken. The removed electric box must be protected for dustproof and waterproof purposes.
Step 3: Release refrigerant.
Refrigerant should be released from the high pressure side and low pressure side at the same time.
If it is released from one side only, the scroll is sealed, causing the refrigerant to fail to be released
completely. Control the release speed (it is expected to release for 12 hours or more). If too fast, massive
lubricant will be discharged with the refrigerant. Make sure to mark the valves.
1.Unscrew the
electric box.
2.Make sure to
support the
electric box.
3.Take the
electric box
out.
4.The method
of removing
the box at the
left side is
similar to that
of removing
this electric
box.
Summary of Contents for GC201808-III
Page 87: ...GREE GMV5 HR HEAT RECOVERY UNITS 83 1 External Connection for Individual Units ...
Page 92: ...GREE GMV5 HR HEAT RECOVERY UNITS 88 ...
Page 227: ...GREE GMV5 HR HEAT RECOVERY UNITS 223 Troubleshooting ...
Page 286: ...GREE GMV5 HR HEAT RECOVERY UNITS 282 Troubleshooting ...
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