General Instructions - TdA ZEWMBAD series Technisches Handbuch, Inbetriebnahme Und Betriebsweise

ZWEMBAD SERIES · AIR/WATER SYSTEM
⋅ Flow alarm: Verify the purification pump is operating properly (pump flow may be less than needed). The filter of the
purification pump is dirty. Clean it if needed. By-pass are closed or not sufficiently open. Revise it if needed. The
pump is not working. Revise clock condition and purification mode. The flow switch is faulty (call for service).
Defrost cycle: The ambient conditions are not correct (temperatures are too low). The unit does not work under
⋅
these conditions. It is recommended to disconnect the unit.
Low oil level:
⋅ Low initial oil charge: Refill up to needed level.
⋅ Oil stains on the equipment: Check for leaks in the cooling circuit and repair them if necessary, check the torque on
the high and low pressure valves, and replace them if necessary.
The equipment operates on cycles which are too short:
The low pressure switch opens then closes again: Verify the points mentioned in the "low pressure switch tripped"
⋅
section above.
⋅ Intermittent contact on machine control unit: Repair or replace the faulty electrical part. Check the temperature
indicator.
⋅ Make sure the equipment is not too large for the facilities.
The equipment does not shut down:
⋅ Verify that the thermostat functions properly, repairing or replacing it if necessary.
⋅ Compressor contactor contacts are stuck together: Check that the coil is functioning properly and that the contacts
are not burned.
The pressure of the intake duct is too low: Check the refrigerant charge of the equipment for leaks, to solve this
⋅
problem please refer to the refrigerant charge section. Check that there are no obstructions in the cooling circuit,
filter-drier, expansion valve, etc. and replace if necessary. Verify that the equipment is powerful enough for the
existing thermal conditions.
Excessive noise: The fastening screws of the compressor or fan are loose: Tighten all the fastening elements.
⋅
⋅ Check the compressor oil level.
⋅ The compressor produces internal bumping noises: Check that the noise does not come from any fluid leak from
overheating (see section of refrigerant charge).

GENERAL INSTRUCTIONS

- Any intervention in the refrigeration circuit must be made following the applicable safety regulations: recovery of
refrigeration fluids, nitrogen welds, etc.
- Any welding intervention must be made by qualified welders.
- For units loaded with R-407-C, refer to specific instructions in the user manual.
- Piping can only be replaced by copper pipes according to standard NF EN 12735-I.
- Search for leaks:
1. Never use oxygen or dry air, danger of fire or explosion.
2. Use dry nitrogen or the mixture of nitrogen and coolant indicated in the plate.
- Any substitution of parts different to the ones considered by the manufacturer, any modifications in the refrigeration
circuit, any substitution of refrigeration fluid by a fluid different to the one indicated in the plate or any use of the unit
beyond the limits specified in the unit documentation would result in the cancellation of the guarantee.
- All information must be registered in the unit manual that must be included in the installation project.
© ZWEMBAD 2015. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT.
ENGLISH
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