YMGI WMMS-30CH-V2B(59)5, Руководство по обслуживанию, Страница: 65 / 81

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5. Compressor Cannot Operate
Possible causes
Determination Method
(Air conditioner Status)
Troubleshooting
Incorrect wire connection, or
poor connection. Check the wiring status according to
circuit diagram
Connect wires according to wiring diagram
to
make sure all wiring terminals are
connected firmly
Compressor capacitor is
damaged.
Measure the capacity of fan capacitor with
a universal meter and see if the capacity is
out of the normal operating range indicated
on the nameplate of fan capacitor.
Replace the compressor capacitor
Power voltage is low or high.
Use universal meter to measure the power
supply voltage. The voltage is a little high
or low
Suggest to equip with voltage regulator
Compressor coil is burnt out.
Use a universal meter to measure the
resistance between compressor terminals
and its 0.
Repair or replace compressor
Cylinder of compressor is
blocked.
Compressor cannot operate. Repair or replace compressor
6. Air Conditioner is Leaking Water
Possible causes
Determination Method
(Air conditioner Status)
Troubleshooting
Drain pipe is blocked Water leaks from indoor unit Eliminate the blockage inside the drain pipe
Drain pipe is broken Water leaks from drain pipe Replace drain pipe
Wrapping is not tight
Water leaks from the pipe connection area
of the indoor unit
Wrap it again and bundle it tightly
7. Abnormal Sound or Vibrations
Possible causes
Determination Method
(Air conditioner Status)
Troubleshooting
When turning the unit on or
off, panels and parts of the
unit can expand and create
noise.
Unit creates a the sound of "PAPA"
Normal phenomenon. The sound will
cease after a few minutes when metal
components cool off.
When turning the unit on or
off, an sound caused by flow
of refrigerant inside air
conditioner
Water-running sound can be heard
Normal phenomenon. The sound will
cease after a few minutes.
Check for foreign objects
inside the indoor unit or there
are parts touching inside the
indoor unit
An abnormal sound is coming from the
indoor unit
Remove any foreign objects or debris.
Inspect fan blades, and adjust any parts
positions of indoor unit. tighten screws
and buffer vibration any connected parts
Short circuit inside the
magnetic coil
While in heating mode, the four way
valve has abnormal electromagnetic
sound
Replace magnetic coil