Deltech SPX Flow DSHD Series Instruction Manual page 16

Display: 202
(LED Warning/ Service/ Alarm flashes yellow)
(Drain warning, leads to deactivation of the relay warning / service)
Possible Cause
Condensate not separated.
Display: 204
(LED Warning/ Service/ Alarm flashes red)
(PDP Alarm, leads to deactivation of the relay alarm)
Possible Cause
Desiccant dryer only switched on briefly.
Desiccant dryer overload.
Ambient temperature too high.
Air inlet temperature high.
Volumetric flow rate too high.
Operation pressure too low.
PDP sensor defective (PT029)
Display: 210
(LED Warning/ Service/ Alarm glows red)
(PDP Sensor cable break, leads to deactivation of the relay alarm)
Possible Cause
PDP Sensor cable break
PDP sensor not connected
14
Remedy
Press TEST-button on the condensate discharger (X001/ see chapter 12).
Condensate is not discharged:
- Check power supply to solenoid coil.
In case of power on this terminal replace printed circuit board.
- Check if dryer and condensate discharger are pressurized (min. 0.8bar
/11.6psi). If they are pressurized check if outlet pipe behind the conden-
sate discharger is blocked.
Yes: Clean pipe and remove any obstruction.
No: Disconnect dryer and condensate discharger from power supply
(main switch / fuse) and ensure that device is in a pressure-less state.
Dismantle solenoid diaphragm, remove any obstruction and examine
diaphragm. If diaphragm is damaged replace with new one. During this
procedure, it is possible to replace also all seals and the coil core.
Housing and sensors should be thoroughly cleaned at the same time.
Condensate and air are discharged, but ALARM -signal continues
- Disconnect dryer and condensate discharger from power supply (main
switch / fuse) and ensure that device is in pressureless state. Open con-
densate discharger and clean sensor thoroughly.
Remedy
Operate desiccant dryer for some time with low load.
Adapt the operating conditions to the permitted parameters.
Check the PDP sensor and replace, if necessary.
Remedy
Check the electrical connection, replace if necessary.
PDP-control switch off (see chapter 6.5.4)