Friedrich MRM09Y1J, Service & Parts Manual

Page: 110 / 135

110 PB
Possible Causes Discriminating Method (Air conditioner
Status) Troubleshooting
Capacity of compressor is damaged "Measure the capacity of fan capacitor with
an universal meter and find that the capac
-
ity is out of the deviation range indicated on
the nameplate of
fan capacitor."
Replace the compressor capacitor
"Power voltage is a little 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
Coil of compressor is burnt out "Use universal meter to measure the
resistance
between compressor terminals and it's 0"
Repair or replace compressor
Cylinder of compressor is blocked Compressor can't operate Repair or replace compressor
Air Conditioner is Leaking
Drain pipe is blocked
Water leaking from indoor unit "Eliminate the foreign objects inside the
drain
pipe"
Drain pipe is broken Water leaking from drain pipe Replace drain pipe
Wrapping is not tight "Water leaking from the pipe connection
place of
indoor unit"
Wrap it again and bundle it tightly
Abnormal Sound and vibration
"When turn on or turn off the unit, the panel
and other parts will expand and there's
abnormal
sound"
There's the sound of "PAPA" Normal phenomenon. Abnormal sound will
disappear after a few minutes.
"When turn on or turn off the unit, there's
abnormal sound due
to flow of refrigerant inside air
conditioner"
Water-running sound can be heard Normal phenomenon. Abnormal sound will
disappear after a few minutes.
"Foreign objects inside the indoor
unit or there're parts touching together
inside the indoor unit"
There's abnormal sound fro indoor unit "Remove foreign objects. Adjust all parts'
position of indoor unit, tighten screws and
stick damping plaster between connected
parts"
"Foreign objects inside the outdoor unit or
there're parts touching
together inside the outdoor unit"
There's abnormal sound fro outdoor unit "Remove foreign objects. Adjust all parts'
position of outdoor unit, tighten screws and
stick damping plaster between connected
parts"
"Short circuit inside the magnetic
coil"
"During heating, the way valve has abnor -
mal
electromagnetic sound"
Replace magnetic coil
Abnormal shake of compressor Outdoor unit gives out abnormal sound "Adjust the support foot mat of compres -
sor,
tighten the bolts"
TROUBLESHOOTING
Troubleshooting for normal Malfunction