Daikin RZQ100B8V3B Service Manual page 165

ESIE05-03
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Part 3 – Troubleshooting
Is this
YES
first starting after
installation?
NO
YES
Is the unit in
defrost mode?
NO
Measure the temperature of
suction air and supply air.
Temperature difference =
Suction air temp. – Supply air
temp.
Temperature
YES
difference for heating
should be between 14
and 30˚C.
NO
Is
the operation YES
current less than specified
level?
NO
Does
YES
indoor unit air flow
rate down?
NO
Is the
YES
level of high
pressure lower than
normal level?
NO
* Insufficient compression of
compressor
* Insufficient circulation of
refrigerant
* Faulty expansion valve
Does
the heat load
YES
increase after installation
of the unit?
NO
* 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".)
Troubleshooting
This is normal. Heating
operation will be conducted
after 2 or 3 minutes.
See page 2-15 "Test Run
Control" for details.
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
(S1995)
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