Daikin FAQ100BVV1B [175/381] Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred

Daikin FCQ50B7V1 [175/381] Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred
ESIEN05-04 Troubleshooting
Part 3 Troubleshooting 3–13
33
4
5
1
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Measure the temperature of
suction air and supply air.
Temperature difference =
Suction air temp. – Supply air
temp.
Wait for a while.
No abnormality
No abnormality
Additional unit installation
should be considered
After vacuum drying, charge
correct amount of refrigerant.
Check each item
Check each item
Check each item
Temperature
difference for heating
should be between 14
and 30˚C.
Is the unit
in defrost mode?
Is the operation
current less than specified
level?
Does the
heat load increase after
installation of the
unit?
YES
YES
YES
YES
YES
YES
Incorrect selection of model
Affection of sunlight
Affection of excessive fresh
air into room
Gas shortage possibly
generates trouble.
Clogged air filter
Soiled heat exchanger
Malfunction of indoor fan
motor (Refer error code “A6”)
Refrigerant overcharge
Soiled heat exchanger
Short circuit of discharge air
Disturbing item in air flow
Malfunction of fan motor of
outdoor unit
(Refer error code “E7”, “H7”)
Insufficient compression of
compressor
Insufficient circulation of
refrigerant
Faulty expansion valve
NO
NO
NO
Does indoor
unit air flow
rate down?
NO
Is the level
of high pressure lower
than normal level?
NO
NO
(S1995)

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