Service manual
Table Of Contents
- DNG DC Inverter Series
- LIST OF EFFECTIVE PAGES
- TABLE OF CONTENTS
- INTRODUCTION
- PRODUCT DATA SHEET
- RATING CONDITIONS
- OUTLINE DIMENSIONS
- PERFORMANCE DATA & PRESSURE CURVES
- AIRFLOW CURVES
- SOUND LEVEL CHARACTERISTICS
- ELECTRICAL DATA
- WIRING DIAGRAMS
- REFRIGERATION DIAGRAMS
- TUBING CONNECTIONS
- CONTROL SYSTEM
- TROUBLESHOOTING
- EXPLODED VIEWS AND SPARE PARTS LISTS
- APPENDIX A
12-11
CONTROL SYSTEM
SM DNGDCI 2-E.1 GB
12.9.5.2 Heat Sink Overheating Protection For DCI72/80
HST
Delta HST
<-2 -2 -1,0,1 2 >2
HST ≥ 81 SC SC SC SC SC
79 = HST < 81 D1 D1 D2 D2 D2
75 = HST < 79 SR SR D1 D2 D2
73= HST< 75 SR SR SR D1 D1
71 = HST = 73 Norm Norm SR SR SR
HST < 71 Norm
12.9.6 System Over Power Protection Only For DCI72/80
Power
Delta PWR
< -2000 [-2000,0) 0 (0,2000]> 2000
PWR1 PWR2
PWR ≥ 3500 PWR ≥ 2900 SC SC SC SC SC
3300=PWR < 3500 2750=PWR < 2900 D1 D1 D2 D2 D2
3100 =PWR < 3300 2600=PWR < 2750 SR SR D1 D2 D2
3000=PWR < 3100 2450=PWR < 2600 SR SR SR D1 D1
2950 =PWR = 3000 2300 =PWR = 2450 Norm Norm Norm SR SR
PWR < 2950 PWR < 2300 Norm
There are two sets of OVRPWR values, the selection of the values are set according
to the state of the Power-Shed input.
Power-Shed input open Set values 1
Power-Shed input sort Set values 2
12.9.7 Outdoor Coil Deicing Protection
12.9.7.1 Outdoor coil Deicing Protection For DCI60
Entering Deicing Conditions:
Deicing operation will start when either one of the following conditions exist:
Case 1: OCT < OAT – 8 AND TLD > DI
Case 2: OCT < OAT – 12 AND TLD > 30 minutes.
Case 3: OCT is Invalid AND TLD > DI
Case 5: NLOAD = 0 AND OCT < OAT -8
Case 6: OCT<-19 AND TLD>60 minutes
All this condition will exist during 10 seconds
CONTENT