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P
art 4 - Diagnosis and T
roubleshoo
ting
2.3 Check Buttons
Refrigerant system SW2 check button
2.3.1
Button SW2 is used to check the parameters of the refrigerant system. Refer to Table 4-2.1 First, press Button SW2 for 3
seconds and the first parameter (operating mode) will be displayed. Then, on each subsequent press, the next parameter
is displayed.
Table 4-2.9:
SW2 system check
Number
Parameters displayed on digital display
Remarks
1
Operating mode
0: standby; 2: cooling; 3: heating; 4 forced
cooling.
2
Fan speed index
Refer to Note 1
3
Compressor target speed command from hydronic system (rps)
Actual value = value displayed
4
Compressor target speed after restriction by the compressor output control
(rps)
Actual value = value displayed
5
Heating mode: Air side heat exchanger refrigerant inlet temperature (°C)
Cooling mode: Air side heat exchanger refrigerant outlet temperature (°C)
Actual value = value displayed
6
Outdoor ambient temperature (°C)
When no decimal point is displayed:
y
Temperature is ≥ -9°C
y
Actual value = value displayed
When decimal point is displayed
between the two digits:
y
Temperature is ≤ -10°C
y
Actual value = value displayed x -10
y
Example: “1.2” indicates -12°C
7
Discharge temperature (°C)
When the temperature < 100 °C, actual value =
value displayed. When the temperature
ı
100 °C, actual value = value displayed × 10
8
Suction temperature (°C)
Actual value = value displayed
9
EXV position
Steps = value displayed × 8
10
Compressor current (A)
Actual value = value displayed
11
DC voltage
Actual value = value displayed × 10
12
Air side heat exchanger refrigerant pressure (MPa)
Actual value = value displayed
13
Refrigerant system main PCB software version
14
Most recent error or protection code
“nn” is displayed if no error or protection
events have occurred since start-up
15
--
Notes:
1.
The fan speed index is related to the fan speed in rpm as described in Table 3-5.3 in Part 3, 5.6 “Outdoor Fan Control”.
MUNDOCLIMA AEROTHERM V17 - BIBLOC
