Fisher FSFIF-121AE2, Service Manual

Page: 130 / 157

Electrical Control Function
126 Electrical Control System
26 Indoor room temp. of 2# indoor unit
If the temp. is lower than 0 degree, the digital display tube will
show “0”.If the temp. is higher than 70 degree, the digital
display tube will show “70”. If the capacity demand is 0, , the
digital display tube will show “0. If the indoor unit is not
connected, the digital display tube will show: “
―― ”
27 Average of Indoor room temp.
If the temp. is lower than 0 degree, the digital display tube will
show “0”.If the temp. is higher than 70 degree, the digital
display tube will show “70”.
28 Shutdown reason Refer to Appendix
29 T2B of 1# indoor unit
If the temp. is lower than -9 degree, the digital display tube will
show “9”.If the temp. is higher than 70 degree, the digital
display tube will show “70”. If the capacity demand is 0, , the
digital display tube will show “0. If the indoor unit is not
connected, the digital display tube will show: “
―― ”
30 T2B of 2# indoor unit
If the temp. is lower than 0 degree, the digital display tube will
show “0”.If the temp. is higher than 70 degree, the digital
display tube will show “70”. If the capacity demand is 0, , the
digital display tube will show “0. If the indoor unit is not
connected, the digital display tube will show: “
―― ”
Appendix
Shutdown Reason
Code
Frequency limit caused by current
1
Frequency limit caused by T2.in cooling
2
Frequency limit caused by T2.in heating
3
Reach to the setting temperature
4
Frequency limit caused by T4.
5
Defrosting
6
Mode switching
7
High discharge temperature protection
9
High evaporator coil temp.T2 protection
10
Evaporator low temperature T2 protection
11
Condenser high temperature T3 protection
12
Low indoor room temperature protection in drying mode
13
Too low
ambient
temperature protection
14
Refrigerant leakage detection
15
Communication malfunction between indoor and outdoor units
16
Communication error between outdoor main chip and compressor driven chip IR341
17
AC voltage protection
18
Top temperature protection of compressor
19
Outdoor EE Malfunction
20
Fan speed has been out of control
21
Open or short circuit of temperature sensor
22
Overcurrent protection
23
IMP overcurrent protection
24
Compressor lack of phase
25
Compressor has been out of control
26
Low pressure protection of 311
27
Fan current protection
28
Fan lack of phase
29
Fan zero speed protection
30
PFC module protection
31
High pressure protection of 311
32
Zero speed malfunction
33
PWM malfunction
34
MCE malfunction
35
Compressor overcurrent protection
36
Compressor EE malfunction
37
Compressor start-up malfunction
38
311 fan speed has been out of control
39
Low pressure protection
40
High pressure protection
41
PFC module malfunction
42
Shutdown stop
49
Electrical disconnect
50
DR stop
51