Trouble Shooting
20
A07 Low pressure cut-out
compressor 4
(Premium only)
See A01 See A01
A08 High pressure cut-out
compressor 4
(Premium only)
See A02 See A02
A09 Cabin temperature
sensor failure
(internal and external)
Broken internal or external temperature
sensor, open/short circuit, not present or
programmed wrong.
Replace sensor or controller.
In case of external sensor try to reprogram
to internal sensor first to determine
failure.
A10 Evaporator temperature
sensor failure.
Defective water temperature sensor
(Premium), evaporator sensor (Classic) or
open/short circuit.
Check wiring or replace sensor.
Water infiltration (condense) can cause a
read-out derivation or erratic functioning
before an error code occurred.
CA11 All compressors manually
off.
Compressor(s) programmed not active in
controller setting.
Check settings. At least one compressor
should be programmed active.
C01=ON C00=OFF
All compressors
automatically
deactivated.
Chilled water temperature is below cut-in
temperature.
Check compressor status LED on display.
Error message must disappear once
chilled water temperature is rising above
cut-out value (factory setting 7 °C).
bA11 Fan standby. Blower operation from TECC card or
cabin controller impossible.
Discharge temperature higher than set
point on cooling or lower on heating.
Run compressor/unit for a certain time to
reach required discharge temperature.
Blower fan will start and blinking error
code bA11 will disappear automatically.
tA11 T
low
(in cool mode,
deicing) or T
high
(in heat
mode) limit exceeded
(Classic only).
Compressor stopped to defrost or to cool
down in heat mode.
Compressor exceeded limits. Automatic
restart, no complete system halt.
Code <tA11> visible in the display instead
of evaporator coil temperature.
Press <F> key (5) to read out evaporator
coil temperature or code <tA11> (F key -
line E).
Check controller settings to be set default
(29 °C line 0, 1, 2 and 3).
EA11 ΔT between chilled water
IN/OUT above limit
(Premium only).
Insufficient evaporator water flow. Check controller settings, see 29 °C
settings line F.
Check water flow, ΔT evaporator in/out
minimum 4K.
Bleed water system or check pump
operation.
init Initialization procedure or
system block.
Setting DIP switches not according to the
number of compressors.
Check setting DIP switches
(TECC V2 only).
Defective wiring,
open/short circuit.
Check control panel controller cable and
connections.
Replace defective cable, panel or
controller card.
Failure
code
Description Possible cause Solution
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