TABLE OF CONTENTS
1
. General
1.1 Application
1.2
Content
2
. Unit
2.1 Introduction
2
.
2
Working Principle
2
.
3
Performance Curve
2.4 Airflow Direction
（
2
.
5
.
1
）Unit Housing
（
2
.
5
.
2
）Air Inlet & Outlet
（
2
.
5
.
3
）Dehumidification Section
（
2
.
5
.
4
）Compressor
2.5 Housing & Structure
（
2
.
5
.
5
）Throttling Section
（
2
.
5
.
6
）Controller Protection
（
2
.
5
.
7
）Structure & Dimension
2.6 Technical Parameters
3. Installation
3.1 Introduction
3
.
2
Delivery & Storage
3.3 Inspection
3.4 Unit Movement
3.5 Location Requirement
（
3.8
.
1
）Drainage Pipe Test
3.6 Ground Level
3.7 Duct Connection
3.8 Negative-pressure Drainage Pipe Installation
3.9 Wiring
3.10 External Humidity Sensor Connection
4
. Ducting
4.1 Introduction
（
4
.
1
.
1
）Non-ducted Installation
（
4
.
1
.
2
）Ducting for Fresh Air
（
4
.
1
.
3
）Installation with HVAC system
5
. Commitioning
5
.
1
Introduction
5
.
2
Unit Check
（
5
.
2
.
1
）Duct Check
（
5
.
2
.
2
）Wiring Check
（
5
.
2
.
3
）Controller Check
6
. Controller
6.1 General
（6.1.1）Controller Terminals
（
6 . 1 . 2
）Terminals Diagram
（6.1.3）Controller’s Interface
（6 . 1 . 4）
Parameters Setting
（6.1.5）
Icon
6.2 Controller Logic
（6.2.1）Working Mode
（
6.2.2
）
Dehumidification Working Mode
6.3 Initial Value
6.4 Fan Control
6.5 Air Damper Control
6.6 Defrost Control
6.7 Alarm
（6.7.1）Filter Alarm
（
6.7.2
）
Built-in temp.&humid sensor Error
（6 . 7 . 3）
RS485-1 Communication Error
6.8 Working Status Display
6.9 Error Code
6.10 External temp.&humid sensor
6.11 Parameters Set
6.12 RS4885-2 Mod-bus Communication Protocol
6.13 Wi-Fi Connection
7
. Maintenance
7
.
1
Introduction
7
.
2
Filter
7
.
3
Motor
7
.
4
Technical Description
8
. Troubleshooting
8
.
1
Introduction
8
.
2
Description
9
. Electric Diagram
1
1
1
2
2
2
3
4
4
4
4
5
5
5
5
6
8
9
9
9
9
9
9
9
10
10
11
12
12
13
13
13
13
14
15
15
15
15
16
17
17
18
19
20
21
21
21
21
22
22
23
23
23
23
24
24
25
26
27
29
29
30
30
31
15
5
.
3
Unit Running
5
.
4
Air rate Adjustment
5.5 Performance Test
16
16
16
17
17
23
24
29
29
29
30
