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Troubleshooting Based on Equipment Condition
SiBE28-804
134
Troubleshooting
Troubleshooting
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)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Summary of Contents for FHQ100BUV1B x 2
Page 13: ...SiBE28 804 2 ...
Page 19: ...Model Name and Power Supply SiBE28 804 8 General Information ...
Page 29: ...Specifications SiBE28 804 18 Specifications ...
Page 33: ...Wired Remote Controller SiBE28 804 22 Remote Controller 1 2 Installation ...
Page 34: ...SiBE28 804 Wired Remote Controller Remote Controller 23 ...
Page 93: ...Outdoor Unit Fan Speed Control SiBE28 804 82 Functional Description ...
Page 131: ...Test Run and Operation Data SiBE28 804 120 Test Operation ...
Page 251: ...Troubleshooting by Remote Controller Display LED Display SiBE28 804 240 Troubleshooting ...
Page 277: ...PCB Layout SiBE28 804 266 Appendix ...
Page 297: ...RZQ100 140C7 RZQS125 140C7V1B SiBE28 804 286 Removal Procedure ...
Page 311: ...SiBE28 804 iv Index ...