Rev A
（
ACT-VCC-5000-AC)
7
2.9 LED Display Parameter setting guide:
Table 2.2: Parameter setting range
Items
code
Item name
Default
Value
Value Range
Unit
P01
Communication address for master/slave
unit setting
1 - slave
unit
1 – slave unit; 2 – master unit,
/
P02
Compressor starting temperature
35
18~50
℃
P03
Hysteresis value for compressor start/stop
5
1~5
℃
P04
High-temperature alarming value
58
35
～
100
℃
P05
Low temperature alarming value
-42
-42
～
25
℃
P06
Heater starting temperature value*
5
-45~15
℃
P07
Hysteresis value for heating start/stop*
10
5~20
℃
P08
External input signal type definition
2
0: disable; 1: NO type; 2: NC type
P09
Master/Slave function definition
0
0 – disable 1 - enable
P10
Master/slave switching period for each unit
12 hours
0~72 hours
P97
Return to factory setting
/
Pressing the “S” key will return the
product to default factory settings
*Heating functions are optional and not included on all units.
The above parameters can be accessed through RS485 communication if necessary. For questions, please contact
ACT’s sales staff at 717-295-6061.
2.10 Alarm and fault management
During normal operation, the LED displays the return air temperature leaving the air conditioner. An alarm signal will
alert the user to an error and the alarm code error message will be displayed alternately with the return air
temperature. Alarm codes are as follows:
Table:2.3 Error Code meanings
Error Code
Code Definition
E01
Internal fan No.1 fault warning
E02
Internal fan No.2 fault warning
E03
External fan No.1 fault warning
E04
External fan No.2 fault warning
E05
Compression fault warning
E06
Communication fault warning
E07
High-temperature warning
