AUX EL Series Instruções de Operação descarregar pdf (Página 37)

09/11/2014 35 NI401

Troubleshooting – EZGEO Control

Sensor Temperature Calibration – both remote sensors are digital electronic and factory calibrated. Normally

these do not require field calibration or verification. However, if sensor temperature error is determined, use special

PC software disc and PC serial port cable. The PC screen has direct readout of both temperatures, allows a visual

determination of WarmFlo internal temperature settings, and can be used to offset either temperature sensor for

troubleshooting and demonstration purposes. This is especially valuable during summer installation.

Override, “E” Tab Input – during a normal roomstat heat call and W2 is jumpered to W, it brings on all four stages

and essentially bypasses any temperature sensing or stage modulation functions. In other words, with a W2 input

(still need the normal W stat input) this is simply a turn-on/turn-off device.

During a normal roomstat heat call and E-GAS is jumpered to W, it forces a standby (SB) action.

During a normal roomstat cool call and Y2 is jumpered to Y, it forces a compressor to full capacity.

SOT bypass – adding a jumper wire between J6 and Common will shorten the SOT time down to 1/30

of the SOT

set point. For example. if SOT dial is set to position 0 (30 minutes), the EZGEO control will switch to full output in

one minute with the test wire in place.

Bad sensor, safety – if the internal logic detects open sensor wire, incorrectly wired sensor, or some bad sensor

transmitted value conditions; the green LED reverts to a pulsing mode. Basically the appropriate sensor is set

internally to a 0° value and the WarmFlo main board only allows stage 1 and stage 2 on.

- OT sensor – approximately 1/10 second blip every ½ second

- ST sensor – two, 1/10 second blips every ½ second

- Both bad – ½ second on and ½ second off, alternating

Bad sensor, operating default condition – the detection of bad sensor forces the controller to a fixed stage

operation.

- ST sensor

 Stages 1 and 2 on, stages 3 and 4 off (5 kW maximum)

 The PC screen reads “254” or “BAD”

- OT sensor

 Set to a default of 2° F, see Figures 1, 2, 3, 4

 The PC screen reads “254” or “BAD”

Internal fuses – the internal desuperheater pump and the source loop pump station terminal block have internal

fuses. These are located above the compressor contactor.

- The external decal provides the fuse size and details.

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AUX EL Series Instruções de Operação Página 37