Glow-worm Clearly Heat Pumps 14kW - Manual (Page 37)

0020117819_01 - 05/11 - Glow-worm
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MAINTENANCE
i
Any work carried out on the refrigerant circuit must be
conducted by qualifi ed engineers.
The faults described in this chapter require the services
of a qualifi ed 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 specifi c 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 qualifi ed engineer or a Glow-worm
Groupservice engineer.
17.2.1 Fault codes accessible from the install menu
When the symbol “a” blinks at the bottom left of the control box,
the appliance has a fault. You should access parameters 22 (last
fault code) and 23 (history of last 4 faults) on the installer menu.
• Simultaneously press the ( ) and ( ) buttons for 3
seconds, the parameter number is displayed and its value
blinks.
• Press the buttons ( ) until parameter 22 or 23 is displayed.
• Press the (M) button to access the parameter, the value of the
parameter blinks.
• Press the ( ) buttons to modify the value.
• Press the (M) button to confi rm the parameter setting.
• Press the (OK) button to exit the menu and confi rm the settings.
• Refer to the “Hydraulic and refrigerant schematic” chapter to
identify the sensor positions.
Code Description
3 Heat pump return temperature sensor fault (n°15)
4 Pre-regulator temperature sensor fault (n°18)
5 Remote outside air temperature sensor fault
6 Loss of communication with the command unit
7 Control box ambient air temperature sensor fault
8 Power matching fault between the electronic control circuit board
and the appliance
9 Water fl ow rate (n°10) or circulator pump (n°11) sensor fault
Code Description
10 Outside air temperature greater than the maximum in heating
(parameter 119)
11 Air temperature higher than the maximum value for heating
12 Outside air temperature greater than the maximum in cooling
(parameter 123)
14 Loss of compressor signal
15 Heat pump outlet temperature sensor fault (n°14)
17 Outside air temperature sensor fault (n°2)
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 Fin exchanger (n°4) or compressor intake (n°6) temperature
sensor fault
23 Compressor outlet temperature sensor fault (n°23)
24 Outside fan fault
26 Other outside faults
27 Compressor blocked
28 Compressor outlet temperature error
29 Compressor breakdown
30 Low pressure switch
31 Over-pressure valve
17.2.2 Specifi c faults shown on the control box main
screen
The faults listed below are identifi ed directly on the control box
main screen.
Fault Description
Control box ambient
temperature sensor
fault
In the case of an anomaly in the temperature
sensor measurement, the temperature
display is replaced by “--“.
Control box ambient
humidity sensor fault
In the case of an anomaly in the humidity
sensor measurement, the ambient humidity
display is replaced by “--“.
Control box EEPROM
fault
If the control box non-volatile memory
(EEPROM) is defective, the code “E4” is
displayed in the control box temperature
display area. If the power is cut after this
fault is displayed, the installer and after-
sales parameters will be restored to their
default values and the installation-specifi c
parameters will be erased. This fault can
result in poor operation of the installation. In
the case of an “E4” fault, replace the control
box.
Communications fault If communication between the control box
and the heat pump control circuit board
is disturbed, error “E3” is displayed in
the ambient temperature display area. In
this case, check the communication cable
between the control box and the heat pump.
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