Chapter 4. Function And Operation Of Protective Procedures [1] Protection Device Functions And Operations - Bosch CLC6101i-W 50 HE Service Manual

CHAPTER 4. FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES
[1] PROTECTION DEVICE FUNCTIONS AND OPERATIONS
* These models have following thermistors
INDOOR UNIT
TH1, TH2
The errors for the thermistors that are not mentioned above are irrelevant.
These indoor units don't have power relay.
Function
Indoor unit fan lock
1
Indoor unit fan rota-
tion speed error
2-way valve freeze
2
prevention
Outdoor unit heat
3 exchanger overheat
shutdown
Compressor dis-
4 charge overheat
shutdown
Dehumidifying opera-
5
tion temporary stop
6 DC over current error
7 AC over current error
AC over current error
8 in compressor OFF
status
AC maximum current
9
error
AC current deficiency
10
error
Thermistor installation
11 error or 4-way valve
error
Compressor high
12
temperature error
OUTDOOR UNIT
TH1, TH2, TH3, TH4, TH5
Description
Operation stops if there is no input of rotation
pulse signal from indoor unit fan motor for 1
minute.
Operation stops if rotation pulse signal from
indoor unit fan indicates abnormally low speed
(about 300 rpm or slower).
Compressor stops if temperature of outdoor unit
2-way valve remains below 0°C for 10 contin-
uous minutes during cooling or dehumidifying
operation.
Operation frequency lowers if outdoor unit heat
exchanger temperature exceeds about 55°C
during cooling operation.
Compressor stops if outdoor unit heat exchanger
temperature exceeds about 55°C for 120 sec-
onds at minimum frequency.
Operating frequency lowers if temperature of
compressor discharge thermistor (TH1) falls
below about 110°C.
Compressor stops if temperature of compressor
discharge thermistor (TH1) remains at about
110°C (for 120 seconds in cooling operation, or
60 seconds in heating operation) at minimum
frequency.
Compressor stops if outside air temperature
thermistor is lower than about 16°C during dehu-
midifying operation.
Compressor stops if DC current of about 16 A or
higher flows in IPM.
Operating frequency lowers if outdoor AC current
exceeds peak control current value. Compressor
stops if compressor AC current exceeds peak
control current value at minimum frequency.
Indoor and outdoor units stop if outdoor
AC current exceeds about 3 A while compressor
is in non-operation status.
Compressor stops if outdoor AC current exceeds
17 A.
Compressor stops if operating frequency is 50
Hz or higher and compressor AC current is about
2.0 A or lower.
Compressor stops if high and low values of
temperatures detected by outdoor unit heat
exchanger thermistor (TH2) and 2-way valve
thermistor (TH5) do not match operating cycle.
Compressor stops if compressor discharge
thermistor (TH1) exceeds about 114°C, or if
there is short-circuit in TH1.
Climate Class 6100i / 6000i / 8100i / 8000i
Operation
Detection period Reset condition
When indoor unit Operation OFF or
fan is in operation ON
When indoor unit Operation OFF or
fan is in operation ON
Automatic reset
When in cooling when tempera-
or dehumidifying ture of 2-way
operation valve rises above
10°C.
When in cooling Automatic reset
or dehumidifying after safety period
operation (180 sec).
Automatic reset
When compres-
after safety period
sor is in operation
(180 sec).
Automatic reset
When in dehu-
when outside air
midifying opera-
temperature rises
tion
above 16°C.
When compres- Operation OFF or
sor is in operation ON
When compres- Operation OFF or
sor is in operation ON
When compres- Replacement of
sor is in non-op- defective parts
eration such as IPM
When compres- Operation OFF or
sor is in operation ON
When compres- Operation OFF or
sor is in operation ON
3 minutes after
Operation OFF or
compressor start-
ON
up
When in opera- Operation OFF or
tion ON
4-1
Self-diagnosis
result display
Indoor
Out-
unit Indoor
door
error unit
unit
display
☆ 2 Yes None
☆ 2 Yes None
None None Yes
None None Yes
None None Yes
None None Yes
Yes ☆ 3 Yes Yes
Yes ☆ 1 Yes Yes
Yes ☆ 2 Yes Yes
Yes ☆ 2 Yes Yes
Yes ☆ 1 Yes Yes
Yes ☆ 1 Yes Yes
Yes ☆ 1 Yes Yes