Emerson Fluid Chiller Instrukcja Naprawy Strona 64
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Symptom Possible Cause Action Remark
Valve is not moving
Digital input has priority to
analogue signal input
Digital input must be activated
and deactivated along with
compressor start and stop
Wrong setting of dipswitches
Adjust the dip switches cor-
rectly. The power supply must
be off during this action
Supply voltage too low
Supply voltage: 24VAC ± 10%
if external ECP-024 is used.
Supply voltage: 24VAC or
VDC ± 10% if external
ECP-024 is not connected
Wrong wiring between valve
and driver
Correct the wiring
Valve operating in reverse
direction
Wrong wiring between driver
and valve
Correct the wiring
The valve is not at the posi-
tion corresponding to input
signal
Digital input of driver has
been jumpered so there is no
synchronization at all
Driver does not show any life Wrong supply voltage applied Change EXDU00
Temporary high voltage such
as 110V/230V may damage
the driver
EXD-U00 TROUBLESHOOTING – (Driver with Auxillary Controller)
Function
Dip Switch Number
1 2 3 4 5 6 7 8
EX4/EX5/EX6 operation 0 1 1 0 1 0 – –
EX7 operation 1 0 0 1 0 1 – –
EX8 operation 1 1 0 1 1 1 – –
4-20 mA analogue input signal – – – – – – – 0
0-10V analogue input signal – – – – – – – 1
With start mode – – – – – – 1 –
Without start mode – – – – – – 0 –
3
4
5
6
7
8
1
0
1
2
Superheat Appears Normal -- System Performs Poorly
Problem Symptoms Causes Corrective Action
Valve Doesn't Feed Properly
1) Poor System Performance
2) Low or Normal Superheat
3) Low Suction Pressure
Unequal Circuit Loading Make modification to balance load
Flow From One Coil Affecting
Another Coil
Correct piping
Low Load Correct conditions causing low load
Mismatched Coil/Compressor Correct match
Incorrect Distributor Install correct distributor
Evaporator Oil-Logged Increase gas velocity through coil
Troubleshooting Electronic Valves & Controls
- Technical 1
- Help Guide 1
- Introduction 3
- Table of Contents 4
- Thermal Expansion 5
- Thermal Expansion Valves 6
- Internal Equalizer 6
- Factory Settings of TXVs 7
- External Equalizer 7
- Superheat 9
- Approximate Methods 9
- Superheat Adjustment 9
- TXV Selection 10
- Application Tips 11
- Remote Bulb Well 11
- Remote Bulb Location 11
- Operation at Reduced Capacity 12
- Gas & Gas Cross-Charges 14
- Which Charge to Use? 14
- Adsorption Charges 14
- Liquid Cross-Charges 14
- Other TXV Considerations 15
- Refrigerant Code Names 16
- Emerson MOP 16
- TXV Charge Code Selector 17
- Electronic Valves 18
- & Controls 18
- Electronic Valve Applications 19
- Emerson Climate Technologies 20
- EC3-32 and EC3-33 Systems 20
- Temperature Sensor ECN-N60 20
- Pressure Transmitter – PT4 21
- TXV Controller – EC3-X32 21
- TXV Controller – EC3-X33 22
- Universal Driver – EXD-U00 22
- XEV22 Superheat Controller 22
- Electrical Control Valve – EX 23
- Third Party Controller 23
- Electronic Valves Programming 24
- Solenoid Valves 25
- What Are Solenoid Valves? 26
- 2. Pilot Operated Valve 27
- Types of Solenoids 27
- 2-Way Valves 27
- Solenoid Valve Selection 28
- Application Overview 29
- System Protectors 30
- Absorption vs. Adsorption 32
- Types of Filter driers 32
- Dirt, Waxes, Acid 32
- Sightglass 33
- Suction Filter Driers 34
- Internal Design 35
- Compressor Burnout 36
- Filter Driers for Heat Pumps 37
- Removing Contaminants 37
- One-Way Flow, Both Directions 37
- Simplifying While Servicing 38
- Emerson System Protectors 38
- Regulators 39
- EVAPORATOR 40
- INTERMEDIATE 40
- Figure 3: EPRB(S) Brass Body 41
- (Emerson EPRB) 42
- HeadMaster HP Operation 43
- solenoid VAlVe 46
- Figure 8 47
- Adjusting the Set Point 48
- Oil Controls 49
- Emerson Oil Controls 50
- Temperature 51
- Pressure Controls 51
- Temperature Pressure Controls 52
- TS1 Introduction 52
- Housing Variants 52
- Temperature Sensing 52
- Setpoints 53
- Electrical Contacts 53
- Contact Function 53
- PSC Pressure Switch 56
- PSC Introduction 56
- FSX Introduction 57
- Basic Rules of 58
- Good Practice 58
- Basic Rules of Good Practice 59
- Troubleshooting 61
- SYSTEM TROUBLESHOOTING GUIDE 62
- No Superheat At Start Up Only 63
- Superheat Is Erratic Or Hunts 63
- Troubleshooting Ball Valves 68
- Troubleshooting Regulators 69
- R404A/R507A 70
- Wholesaler/Contractor Support 72
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