20
CODE
EXPLANATION CAUSE
SOLUTION
Motorst. Q1 or Q2.
Process fan overload
(Q1).
Too high airflow.
Motor failure.
Readjust the airflow.
Reset Q1.
Set point.
Reg. fan overload (Q2).
Too high airflow.
Motor failure.
Readjust the airflow.
Reset Q2.
Set point.
Fuse F3-6 or TH1.
Overheat protection on
reg heater tripped (TH1).
Heater failure.
Reset TH1 and F3 through F5.
Note that TH1 will also switch off heater
fuses.
For TH1 adjustment see technical data.
Heater overload (F3
through F6).
Regeneration fan failure.
Regeneration airflow blocked in some
way, for example dirty filters.
Very high temperature on reg. inlet.
Reset TH1 and F3 through F5.
Note that TH1 will also switch off heater
fuses.
For adjustment see technical data.
Frost guard GT81
Freezing protection
device stops the unit.
Temperature on the hot water outlet /
condensate outlet is below 7°C.
Check supply and insulation for potential
thermal loss.
Restart the unit.
Thermostat TH3.
Wet air thermostat tripped
(TH3).
Rotor has stopped.
Process fan has stopped.
Very low moisture load in the process air.
Wet air temperature too high.
Low react. air flow.
Readjust the airflow.
Reset TH3.
Rotor stopped.
Rotor stopped (E2).
Rotor motor failure.
Rotor motor gear.
Belt transmission.
Slipping belt.
Distance too great between sensor and
contact screw.
Sensor failure.
Press
[OFF/1]
and restart the unit.
Fr.converter U1/U2. Frequency converter
alarm (U1 or U2).
Frequency converter failure.
Read message on the converter display,
check the list/check the frequency converter
manual for troubleshooting. Press
[OFF / 2]
and restart the unit.
Emergency stop.
Emergency stop.
The emergency button is still active.
Pull the emergency button to restore. Press
[OFF / 1]
and restart the unit.
FIGURE 29: PLC alarm table and solution
8 Troubleshooting
8.1 PLC-error codes
If an error occurs, the dehumidifier will shut down,
but the reg. fan continues to operate in order to cool
down the regeneration heater for a preset time. See
technical data for time setting.
During shutdown, the PLC will promptly display a code,
where the error is located. The table below displays
the frequent error codes for the CZ-series.
Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz
