Gardner Denver TWISTAIR EWDQ D, Руководство по эксплуатации и обслуживанию

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SHUTDOWN TROUBLE SHOOTING GUIDE (Continued)
Message Action Needed
PUMP/FAN STARTER The controller has attempted to start the pump and fan, but did not receive
a return signal from the starter’s auxiliary contact. If the starter does not
pick up when attempting to start, check that connector 9 of the controller
is plugged in firmly, and check the starter coil. If the starter does pick up,
but this message appears, check that the auxiliary contact block is proper-
ly installed on the starter and wired to connector 8, terminal 3.
SHORTED THERM The controller has detected a shorted connection to thermistor: (A) air end
discharge, (B) oil injection, or (C) final package discharge to the service
valve. This normally indicates a faulty connection (e.g. wire strands
touching) at the controller connector 4 or 7; check and correct the connec-
tion. This could also be indicating a damaged wire or thermistor probe.
SHORTED XDUCER Signal voltage has exceeded approximately 4.6 volts at transducer: (A)
Final discharge, (B) Water, or (C) Oil. This may indicate a loose connec-
tion of the black wire to the transducer or a defective transducer. Check
connections, or replace transducer if necessary.
WATER PRESS 120 volts has been removed from terminal 7 of the terminal strip. This is
normally shipped jumpered directly to terminal 9, but the jumper may be
removed to add a field installed shutdown switch. Reset the external
switch.
CONTROLS TROUBLE SHOOTING GUIDE
The following are recommended service actions. Observe all instructions noted elsewhere in this manual. All electri-
cal service is to be performed only by a qualified electrician.
Symptom Recommended action
No display, Check incoming power to the compressor unit. Ensure that the discon–
compressor stopped nect is on and that fuses have not blown (or circuit breaker tripped). If pow-
er is being properly supplied to the control box, check the fuses located
at the fan starter, the control transformer fuses, and the fuse located on
the ES controller chassis near connector CN–6.
Compressor will To operate, the controller must be placed into an operating mode (e.g.
not start. “AUTO”); press the [STOP/RESET] key to put the control into the READY
state, then select a mode with the operating mode keys. In AUTOMATIC
and SEQUENCE modes, compressors will not start until the pressure
drops below the reset pressures.
Display indicates The controller prevents attempts to start the main motor if the reservoir
“NOT BLOWN DOWN” pressure is over 5 psig. Pressure continues to be relieved from the reser-
voir while this message is on, and the compressor will start automatically
after the pressure has dropped. If this message remains with NO pres-
sure in the reservoir, follow the transducer zeroing procedure found in the
controls adjustment section.
Display indicates The controller is provided with an input for user–furnished remote con–
“REMOTE STOP” trols. This display indicates that 120 volt is removed from terminal 6 of the
terminal strip. Check all connections of the factory installed jumper, or the
customer – provided controls, if applicable.