Troubleshooting Based on Equipment Condition
SiBE28-804
128
Troubleshooting
Troubleshooting
Output
from
PC
board
Is the power
switch OFF or the fuse for
power switch
blown?
Is the
heating switch
turned on at outdoor
temperature
>32˚C
YES
c
Is rated
voltage applied at
the compressor
terminals?
d
Is rated voltage
output from the magnetic switch
or power
transistor?
e
Is rated voltage
output from the
PC board?
YES
YES
· Indoor unit fan runs at set airflow rate.
· (In cooling operation)
When air thermistor ambient temperature is higher than set temperature
· (In heating operation)
When air thermistor ambient temperature is lower than set temperature
Indoor unit
PC board
Outdoor unit
PC board
Relay
c
Output from
magnetic
switch or
U,V,W of
power
transistor
d
Output from
magnetic
switch or SW
circuit of
power
transistor
e
Output from
relay or
microcomputer
Input
to PC
board
Input
to PC
board
(S2576)
NO
NO
YES
NO
NO
YES
NO
Air sensor
Magnetic
switch
COMP
Turn on the power
switch or replace fuse.
Normal.
(Thermostat OFF by
outdoor temperature)
Replace the compressor.
Replace the magnetic
switch or power
transistor.
Replace the PC board.
Check the thermistor.
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 ...