BICOLD WBA Series - User Manual

Questions and Answers

K
Kelly StoneAug 17, 2025
Why won't my BICOLD WBA compressor start?
- B
  Benjamin SuttonAug 17, 2025
  The compressor might fail to start due to several reasons. The microprocessor board could be in alarm status, requiring you to identify the alarm and take action. There might be no power because the main door lock breaker switch is open, so you should close it. The overload protection might have tripped; in this case, reset the protection and check the unit on start-up. Other potential causes include no cooling demand, a working set-point programmed too high, faulty contactors (which should be renewed or repaired), or a compressor motor fault (check for a short circuit).
K
kellygriffithAug 22, 2025
What causes high discharge pressure at nominal conditions in my BICOLD Chiller?
- G
  Grace GayAug 23, 2025
  High discharge pressure at nominal conditions can occur due to insufficient cooling air to coils (in chiller mode). Check the operation of fans, compliance with technical clearances, and possible obstruction of coils. It can also be caused by insufficient water circulation on plate exchanger (in heat pump mode), so check and adjust if necessary. Another cause could be presence of air in water circuit (in heat pump mode); bleed air from the circuit. Finally, an excessive refrigerant charge can lead to this issue, so discharge excess refrigerant.
M
Madison PerezAug 25, 2025
Why is there excessive compressor noise and vibration in my BICOLD WBA Chiller?
- T
  Troy MackAug 26, 2025
  Excessive compressor noise and vibration can stem from a few reasons. The compressor might be pumping liquid, leading to an excessive increase of refrigerant in the crankcase. In this case, check the operation of the expansion valve, check superheating, and adjust superheating, renewing the expansion valve if necessary. Mechanical problems within the compressor itself could also be the cause, requiring an overhaul of the compressor. Lastly, the unit might be operating at the limit of its envisaged conditions of use; therefore, check efficiency levels against declared limits.
J
jason45Aug 28, 2025
What causes low discharge pressure at nominal conditions in my BICOLD WBA?
- G
  gabrielle67Aug 28, 2025
  Low discharge pressure at nominal conditions may be caused by several factors. There might be insufficient refrigerant charge, so identify and repair any leaks and restore the correct charge. Another cause could be presence of air in the water circuit (in chiller mode), so bleed air from the circuit. Insufficient water flow rate to the evaporator (in chiller mode) can also cause this; check and adjust if necessary. Other potential causes include mechanical problems in the compressor, excessive thermal load (in heat pump mode), or irregular operation of accessory KFI (if installed). If there are mechanical problems in compressor, overhaul it. Check sizing of plant, infiltrations and insulation in case of excessive thermal load. Check calibration of KFI and adjust if necessary.
J
James LindseySep 2, 2025
What causes high suction pressure at nominal conditions in my BICOLD Chiller?
- S
  swillisSep 2, 2025
  High suction pressure at nominal conditions can result from a few issues. Excessive thermal load (in CHILLER mode) can be a cause, so check the sizing of the plant, infiltrations, and insulation. High ambient temperature (operation in heat pump mode) can also lead to this, so check the operating limits of the unit. Irregular operation of the expansion valve can be another factor; check its operation, clean the nozzle, record superheating, and renew if necessary. Finally, mechanical problems in the compressor can contribute to this issue, requiring an overhaul of the compressor.
J
jreynoldsSep 5, 2025
What to do if my BICOLD WBA Chiller compressor is making a humming noise but fails to start?
- J
  jmossSep 5, 2025
  If your compressor is humming but failing to start, it could be due to a few reasons. First, check the power supply voltage and correct the phase sequence, identifying any underlying causes of incorrect voltage. Second, the compressor contactors might be malfunctioning, requiring you to renew the contactor. Finally, there could be mechanical problems within the compressor itself, which would necessitate overhauling the compressor.
J
Joel JohnsonSep 7, 2025
What does it mean if the primary circulator fails to start on my BICOLD WBA and I get a water differential pressure switch alarm?
- A
  Andrew KochSep 8, 2025
  If the primary circulator fails to start and you receive a water differential pressure switch alarm, several issues could be at play. There might be no power to the pumping unit, so check electrical connections and auxiliary fuses. A lack of a signal control board signal requires checking with an authorized service center. The pump could be jammed, so check and free it if necessary. A pump motor fault requires overhauling or renewing the pump. A pump speed selector fault means you should check and renew the component. Finally, the working set point might be fulfilled, so verify this setting.
V
Victoria RoseSep 12, 2025
What to do if BICOLD WBA Chiller compressor runs intermittently with a low pressure switch alarm?
- A
  Arthur MaloneSep 12, 2025
  If the compressor runs intermittently and you're getting a low pressure switch alarm, it could be due to a few things. The low pressure switch itself might be malfunctioning, so check its calibration and operation. There might be insufficient refrigerant charge, so find and repair any leaks, then replenish the refrigerant. A clogged refrigerant liquid line filter (iced up) could also be the culprit, requiring you to renew the filter. Finally, irregular operation of the expansion valve could be to blame, so check its calibration, record superheating, and replace if necessary.
S
Stephen TaylorSep 13, 2025
What does it mean if my BICOLD WBA Chiller compressor stops and I get a high pressure switch alarm?
- R
  Robert PowellSep 13, 2025
  If the compressor stops and you receive a high pressure switch alarm, several factors could be responsible. The high pressure switch itself might be faulty, so check its calibration and operation. Insufficient cooling air reaching the coils (in chiller mode) could be the problem; check technical clearances, any obstructions of the coils, and the operation of the fan. A high ambient temperature might also be the cause, so check the unit’s functional limits. Insufficient circulation of water on the plate exchanger (in heat pump mode) requires checking and adjusting as necessary. The presence of air in the water circuit (operating in heat pump mode) means you should bleed the water circuit of air. Finally, an excessive refrigerant charge can cause this, so discharge the excess refrigerant.
J
Jennifer Moreno PhDNov 19, 2025
What to do if BICOLD WBA Chiller compressor runs constantly?
- L
  Lisa KirbyNov 19, 2025
  If the compressor runs constantly, it could be due to several factors. There might be an excessive thermal load, so check the sizing of the plant, infiltrations, and insulation. The working set point might be too low in cooling cycle or too high in heating cycle, so check and alter the setting if necessary. Poor ventilation of coils (in chiller mode) or poor circulation of air on plate exchanger (in heat pump mode) can also be the cause, so check technical clearances, obstructions of the coils, and the operation of the fans; also check and adjust the plate exchanger if needed. Other possible causes include presence of air in the water circuit (when operating in heat pump mode), insufficient refrigerant fluid charge, a clogged refrigerant liquid line filter, a faulty control board, irregula...

Summary

Safety notices for use of the unit

3. SYMBOLS ON THE UNIT BODY

1. Introduction to the BICOLD WBA range

1.2 Identification of the units in the range

Details the coding system used to identify specific BICOLD WBA water chiller models.

1.3 Operating conditions and limits

Specifies the minimum and maximum operating parameters for cooling and heating modes.

1.4 Unit performance

Provides performance data, including cooling duty and power consumption for various models.

2 - INSTALLATION REQUIREMENTS

2.1 Lifting and transport

Details procedures and precautions for safely lifting and transporting the unit.

2-2 Installation and positioning

Outlines site requirements, ventilation needs, and clearance guidelines for unit installation.

2-3 Installation of electrical parts

Covers the electrical hook-up procedures, safety precautions, and wiring requirements.

3. Commissioning and running the chiller

3-1 Commissioning and operation notes

Provides essential checks and precautions before starting up the chiller unit.

3-2 Description of the electrical panel and controller

Explains the components and functions of the unit's electrical panel and microprocessor controller.

User Interface

Describes the unit's user interface, controls, and basic operational procedures.

4. Maintenance

4-1 Periodic cleaning of the unit

Details procedures for periodic inspection and cleaning of condensing coils and water-cooled exchangers.

4.2 Compressor damage

Addresses compressor damage, replacement, and starting procedures for new compressors.

4-3 Procedures in the event of prolonged inactivity of installed units

Outlines procedures for units that have been installed but are not in use for extended periods.

5. WARRANTY

6. SCRAPPING; DISPOSAL OF THE UNIT AT THE END OF ITS WORKING LIFE

BICOLD WBA Series Specifications

General

Brand	BICOLD
Model	WBA Series
Category	Chiller
Language	English