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Daikin EWAP160MBYN [18/22] Aintenance
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Operation manual
17
EWAP110~340MBYNN
Packaged air-cooled water chillers
4PW22677-1B
Symptom 7: Unit runs continuously and the water temperature remains
higher than the temperature set on the controller
Symptom 8: Excessive noises and vibrations of the unit
Symptom 9: The display shows
(only in a DICN system)
Symptom 10: The
message shows
&
10
Symptom 11: The alarm message shows
&
11
Symptom 12: The alarm message shows
&
12
Symptom 13: Sensor or transmitter error
13
MAINTENANCE
In order to ensure optimal availability of the unit, a number of checks
and inspections on the unit and the field wiring have to be carried out
at regular intervals.
If the unit is used for air conditioning application, the described
checks must be executed at least once a year. In case the unit is
used for other applications, the checks must be executed every
4 months.
Maintenance activities
■ Air heat exchanger
Remove dust and any other contaminant from the coil fins using
a brush and a blower. Blow from the inside of the unit. Take care
not to bend or damage the fins.
■ Field wiring and power supply
• Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage marked on the
identification label of the unit.
• Check the connections and make sure they are properly fixed.
• Check the proper operation of the circuit breaker and the earth
leak detector provided on the local supply panel.
■ Internal wiring of the unit
Visually check the switch boxes on loose connections (terminals
and components). Make sure that the electrical components are
not damaged or loose.
■ Earth connection
Make sure that the earth wires are still connected properly and
that the earth terminals are tightened.
■ Refrigerant circuit
• Check for leaks inside the unit. In case a leak is detected, call
your local dealer.
• Check the working pressure of the unit. Refer to "Switching the
unit on" on page 7.
■ Compressor
• Check on oil leaks. If there is an oil leak, call your local dealer.
• Check for abnormal noises and vibrations. If the compressor is
damaged, call your local dealer.
■ Fan motor
• Clean the cooling ribs of the motor.
• Check on abnormal noises. If the fan or motor are damaged, call
your local dealer.
■ Water supply
• Check if the water connection is still well fixed.
• Check the water quality (refer to the installation manual of the unit
for specifications of the water quality).
■ Water filters
• Make sure to clean the water filter in front of the evaporator water
inlet once every 4 months.
• Check the filter for any possible damage and make sure that the
hole diameter size all over the filter surface is still 1.0 mm
maximum.
■ Water sensors
Check that all the water sensors are correctly fixed into the pipes
in front of the heat exchanger (see also the sticker attached to
the heat exchanger).
Disposal requirements
Dismantling of the unit, treatment of the refrigerant, of oil and of other
parts must be done in accordance with relevant local and national
legislation.
POSSIBLE CAUSES CORRECTIVE ACTION
The temperature setting on the
controller is too low.
Check and adjust the temperature
setting.
The heat production in the water
circuit is too high.
The cooling capacity of the unit is too
low. Call your local dealer.
Waterflow is too high. Recalculate the waterflow.
POSSIBLE CAUSES CORRECTIVE ACTION
Unit has not been fixed properly. Fix the unit as described in the
installation manual.
POSSIBLE CAUSES CORRECTIVE ACTION
The adresses set on the PCB or
controller are wrong.
Make sure to set the correct
adresses. Refer to "Setting the
adresses" in the installation manual.
POSSIBLE CAUSES CORRECTIVE ACTION
A unit can not be found by the DICN
system.
Make sure all units in the DICN
system are powered or make sure
the correct number of slaves is
defined in the master unit.
POSSIBLE CAUSES CORRECTIVE ACTION
The control motor is not reacting due
to bad wiring to the motor or the
motor is damaged.
Check if the wiring to the control
motor is correct and not damaged or
loose.
POSSIBLE CAUSES CORRECTIVE ACTION
The control motor is operating in
reverse due to wrong wiring.
Check if the wiring is according to
the wiring diagram.
POSSIBLE CAUSES CORRECTIVE ACTION
The wiring is wrong. Check if the wiring is according to
the wiring diagram. Call your local
dealer.
Before carrying out any maintenance or repair activity,
always switch off the circuit breaker on the supply panel,
remove the fuses or open the protection devices of the
unit.
Never clean the unit with water under pressure.
The wiring and power supply must be checked by a
licensed electrician.
Содержание
- Operation manual 1
- Packaged air cooled water chillers 1
- Electrical specifications 2
- Introduction 2
- Operation manual 2
- Technical specifications 2
- Description 3
- Escription 3
- Important information regarding the refrigerant used 3
- Function of the main components 4
- Safety devices 4
- Internal wiring parts table 5
- Before operation 6
- Checks before initial start up 6
- Efore operation 6
- Power supply connection and crankcase heating 6
- Water supply 6
- Digital controller 7
- General recommendations 7
- Operation 7
- Peration 7
- Working with the unit 7
- Consulting actual operational information 8
- Setting the language 8
- Switching the unit off 8
- Switching the unit on 8
- Switching units on off in a dicn system 8
- Adjusting the temperature setpoint 9
- Resetting the unit 9
- Advanced features of the digital controller 10
- All menus are directly accessible using the corresponding key on the digital controller or through the main menu refer to how to enter a menu on page 6 the down arrow x on the display indicates that you can go to the next screen of the current menu using the h key the up arrow w on the display indicates that you can go to the previous screen of the current menu using the g key if c is displayed this indicates that you can either return to the previous screen or can go to the next screen 10
- Depending upon the settings in the user settings menu the setpoints menu can either be entered directly or by means of the user password 10
- Readout menu 10
- Setpoints menu 10
- The usersettings menu protected by the user password allows a full customization of the units 10
- This chapter gives an overview and a brief functional description of the screens provided by the different menus in the following chapter you will find how you can set up and configure the unit using the various menu functions 10
- Timers menu 10
- Usersettings menu 10
- Additionally the number of safeties that already occured can be consulted on the first line of the history screens 11
- Along with the basic information more detailed information screens can be consulted while the safety menu is active press the q key screens similar to the following will appear 11
- History menu 11
- Info menu 11
- Input output menu 11
- Safeties menu 11
- The history menu contains all the information concerning the latest shutdowns the structure of those menus is identical to the structure of the safeties menu whenever a failure is solved and the operator performs a reset the concerning data from the safeties menu is copied into the history menu 11
- The input output menu gives the status of all the digital inputs and the relay outputs of the unit 11
- The safeties menu provides useful information for trouble shooting purposes the following screens contain basic information 11
- To change the user password 11
- To check the capacity mode and feedback 11
- To check the status of the changeable digital inputs note that for a unit in a dicn system the inputs apply to this unit it will be the remote input on the master unit however that will be determining for the operation of the unit 11
- To check the status of the changeable relay output 11
- To check the status of the discharge thermal protector and the compressor thermal protector 11
- To check the status of the fanspeed relays 11
- To check the status of the high pressure switch the reverse phase protector and the overcurrent relay 11
- To check the status of the power relays 11
- To check the status of the pump the alarm and the evaporator heater voltage free contacts 11
- To check the time and control mode at the moment of the unit shutdown 11
- To check whether or not the emergency stop device is active and if there is any waterflow to the evaporator 11
- To check which was the status of the compressors at the moment of shutdown 11
- To check which were the evaporator and condenser inlet water temperature and the evaporator outlet water temperature 11
- To check which were the pressures of the circuit at the moment of shutdown 11
- To check which were the total amount of running hours of the compressor and the ambient temperature at the moment of shutdown 11
- To consult additional information about the unit such as the unit type and the refrigerant used 11
- To consult information about the circuit safety which caused the shutdown 11
- To consult information about the controller s software version 11
- To consult information about the dual pump which caused the shutdown 11
- To consult information about the network safety which caused the shutdown 11
- To consult information about the pcb 11
- To consult information about the unit safety which caused the shutdown 11
- To consult time and date information 11
- User password menu 11
- Defining and activating the control mode 12
- Defining the capacity limitation settings 12
- Defining the pump control settings 12
- Defining the schedule timer 12
- Defining the thermostat settings 12
- Entering the user settings menu 12
- Network menu 12
- Defining dual evaporator pump control 13
- Defining free cooling 13
- Defining the display settings 13
- Defining the network settings 13
- Defining the floating setpoint settings 13
- Activating or deactivating the setpoints password 14
- Checking the actual value of the software timers 14
- Defining bms control 14
- Checking the safety info and the unit status after a reset 15
- Checking the status of the inputs and outputs 15
- Consulting additional unit information 15
- Listing activated safeties and checking the unit status 15
- Changing the user password 16
- Roubleshooting 16
- Troubleshooting 16
- Aintenance 18
- Disposal requirements 18
- Maintenance 18
- Maintenance activities 18
- Inlet water temperature control outlet water temperature control 19
- Schedule timer example 19
- Thermostat parameters 19
- Floating setpoint working 20
- Free cooling on ambient temperature 20
- Free cooling on difference between inlet water evaporator temperature and ambient temperature 20
- Free cooling working 20
- Oftware structure 21
- Q q q q q 21
- Pw22677 1b 22
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