Daikin RZQ140B7W1B [163/326] Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred

Daikin RZQ140B7W1B [163/326] Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred
ESIE05-03 Troubleshooting
Part 3 Troubleshooting 3–15
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.
Does
indoor unit air flow rate
down?
Is the
level of high
pressure higher than
normal level?
Temperature
difference for cooling should
be between 8 and
18 C.
Does
any frost
generate around inlet
port of indoor unit heat
exchanger or outlet port
of expansion
valve?
Possible causes as follows
* Incorrect selection of model
* Affection of direct sun
Gas shortage possibly
generates trouble.
* Clogged air filter
* Soiled heat exchanger
* Malfunction of fan motor
(Refer error code A6 .)
Possible causes as follows
* Refrigerant overcharge
* Air in refrigerant system
* Soiled heat exchanger
* Short circuit of supply air
* Disturbing item in air flow
* Malfunction of fan motor of
outdoor unit
(Refer error code E7 .)
Does the
heat load increase
after installation
of the unit?
Is the
operation current
less than specified
level?
Possible causes as follows
* Insufficient compression
of compressor
* Insufficient circulation
of refrigerant
* Faulty expansion valve
Normal.
Additional unit installation
should be considered
After vacuum drying, charge
correct amount of refrigerant.
Check each item
Check each item
Check each section
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
(S1994)

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