20
AIR PREPARATION
PROBLEM/SYMPTOM
POSSIBLE CAUSE
SOLUTION
Compressor not operating
- No power to SC27P System
- Check main power to system
- MCI terminal does not have a voltage
signal “Installation Procedure - Electrical”
- Incorrect wiring
- See “Installation Procedures - Electrical”
- Compressor not functioning
- Rebuild or replace as required
Low air flow or no air flow / Low
- Flow meter out of adjustment
- Adjust air flow See “Start-Up &
Pressure or no pressure
Calibration”
- Fouled compressor inlet filter
- Replace inlet filter
- Compressor not functioning
- Rebuild or replace as required
- Air leak
- Check & tighten fittings
- Depressurization Valve failed
- Rebuild or replace as required
Compressor pressure relief
- Excessive backpressure between compressor - Inspect check valves for proper
valve making noise
and sieve bed (ATF)
operation and replace as required.
- Pinched tubing
- Replace tubing
- Compressor not functioning
- Rebuild or replace as required
- Sieve bed (ATF) not functioning
- Replace as required
OZONE GENERATOR
PROBLEM/SYMPTOM
POSSIBLE CAUSE
SOLUTION
“System Power” LED is not
- No power to unit
- Check circuit breakers
illuminated or System is not “ON”
- Switch is in the “OFF” position
- Turn switch to the “ON” position
- Incorrect wiring
- See “Installation Procedures - Electrical”
- Blown fuse
- Replace fuse
Circuit breaker trips
- Incorrect wiring - See “Installation Procedures - Electrical”
- Circuit breaker amperage does not match draw - Replace with correct circuit breaker
- Unit flooded with water
- Assess damage, correct cause and
rebuild as required
Receive an electrical shock
- Incorrect wiring
- See “Installation Procedures - Electrical”
upon touching the unit
- Unit not grounded
- Ground unit according to local codes
- Unit flooded with water
- Assess damage, correct cause and
rebuild as required
Motor Controlled Interlock (MCI)
- MCI terminal does not have voltage
- Apply voltage to MCI terminal, see
LED is not illuminated
“Installation Procedures – Electrical”
“Pressure” LED is not illuminated
- Insufficient pressure in the SC27P
- Adjust air flow and pressure, see “Start-
Up & Calibration” procedures
- See Troubleshooting, Low Pressure or no
pressure
“External Loop” LED is illuminated
- The external loop does not have continuity
- See Figure 7-1A for function
“Manual Control” LED is not
- The system is being controlled by the a
- No action taken
illuminated
Remote 4-20mA Control signal
“Remote 4-20mA Control” LED is not - The system is being controlled by the a
- No action taken
illuminated
Manual Ozone Output Control setting
‘Ozone Output’ LED(s) are not
- The manual ozone output adjustment
- See “Installation Procedures - Electrical”
illuminated
is set to 0% output
- Remote 4-20mA controller is sending a
- No solution required, controller will
4mA signal, which limits output 0%
adjust LED’s automatically
TROUBLE SHOOTING
CHAPTER 9
