Error code:
EC
Reason:
The evaporator probe T2 measures the actual value with the compressor start and takes
this as the reference value T
Start
. If, 5 minutes after the compressor start, the value T
Start
has not dropped by 2 °C for at least 4 seconds then the system assumes that the refrig-
erant is low. The measurement is performed a total of 3 times before the display shows the
error code "EC".
Cause:
n
Refrigerant low or cooling circuit blocked
n
Evaporator probe T2 defective
n
Indoor unit control board defective
Switch off voltage, switch on again 2 minutes
later. Is the error still present?
YES
Check whether the indoor unit blows out cold
air.
YES
Check the position and function of the evapo-
rator probe T2. Is it correctly seated and with
the correct resistance?
NO
YES
Check the cooling circuit for leaks. Leaks
found?
Exchange the control boards of the indoor unit.
YES
Remedy leaks and put the unit back into opera-
tion.
NO
Check the cooling circuit for any blockages. Are
the shut-off valves on the outdoor unit open?
REMKO ATY
34
Summary of Contents for ATY 265
Page 41: ...Resistance values for probes T1 T2 T3 and T4 K Ohm K Ohm K Ohm K Ohm 41...
Page 42: ...Resistance values for probe T5 K Ohm K Ohm K Ohm K Ohm REMKO ATY 42...
Page 49: ...49...
Page 50: ...REMKO ATY 50...
Page 51: ......
