Glow-worm Clearly Heat Pumps Envirosorb2 - Manual (Page 36)

0020117819_00 - 01/11 - Glow-worm
- 34 -
MAINTENANCE
i Any work carried out on the refrigerant circuit must be
conducted by qualified engineers.
The faults described in this chapter require the services
of a qualified professional and, if necessary, a Glow-worm
Groupservice engineer.
17 Trouble-shooting
17.1 fault diagnosis
The following checks should be performed before proceeding
onto specific diagnostics:
• Make sure that the electricity supply has not been interrupted
and that the appliance is connected correctly.
• Ensure that the isolating valves are open.
• Check that all external controls are connected correctly.
17.2 fault codes
i
The faults described in this chapter should be
carried out by a qualified engineer or a Glow-worm
Groupservice engineer.
In case of anomaly, a fault code appears on the command unit's
display.
Code Description
3 Water entry temperature sensor
4 Temperature sensor for cooling fluid on the exchanger
5 Air temperature sensor
6 loss of communication with the command unit
7 Command unit's ambient temperature sensor
8 Capacity combination error
9 Error in water sensor/circulator
10 EEProm fault
11 Air temperature higher than the maximum value for heating
12 Air temperature lower than the minimum value for cooling
14 loss of signal from the variator card
15 Water exit temperature sensor
17 Air variator temperature sensor (TO)
18 Protection against short-circuits in G-Tr variator
20 Error in controlling the position of the compressor rotor
21 Error in current variator sensor
22 Sensors for exchanger refrigerant or compressor admission (TE)
/ (TS)
23 Sensor for compressor flow temperature (TD)
24 Error in fan motor
26 Other variator card errors
27 Compressor blocked
28 Error in flow temperature
29 Compressor breakdown
30 Other variator card errors
31 High-temperature protection
18 Servicing
To ensure the continued efficient and safe operation of the
appliance it is recommended that it is checked and serviced as
necessary at regular intervals. The frequency of servicing will
depend upon the particular installation conditions and usage.
• Servicing/maintenance should be carried out by a competent
person approved at the time by the Health and Safety
Executive in accordance with the rules in force in the countries
of destination.
• To obtain service, please call your installer or Glow-worm’s
own service organisation.
• After servicing, complete the relevant Service Interval Record
section of the Benchmark Checklist located on the inside back
pages of this document.
b
IMPORTANT: any action carried out on the refrigerant
circuit must be performed by qualified authorised
personnel.
The refrigerant fluid contains gases that, when released into the
atmosphere, may affect the environment by depleting the ozone
layer, contributing to the greenhouse effect and an increase in
temperature. The risk of leakage cannot be excluded for devices
intended to operate for many years and subject to the effects of
the environment.
• See the "Safety instructions" chapter for a list of operations to
be performed prior to the maintenance of the application.
• Once the maintenance operations have been completed,
consult the ¨Start Up¨ chapter to restart the appliance.
Annual Maintenance
• Check the proper functioning of safety devices.
• Check the pressure of the water system.
• Check that there are no traces of rust or oil around the cooling
circuit’s components.
• Ensure that the appliance’s components are neither worn nor
broken.
• Check that the wires are firmly attached to the electrical
terminals.
• Check the appliance’s earthing.
• Check the starting temperature of the heat pump and the
adjustment points.
• Check for any ice in the compressor.
• Remove any dust from the power supply.
• Clean the air / refrigerant battery and make sure that air
circulates between the fins and around the unit.
• Check that the fan rotates freely.
• Check the pressure of the expansion vessel.
MAINTENANCE