Emerson MINI-MATE2 user manual Troubleshooting

		Troubleshooting
Table 25 Troubleshooting
Symptom	Possible Cause	Check Or Remedy
Cooling cycle too	Sensor response delay too short	Increase sensor response delay. See 6.11 - Calibrate Sensors.
short
Display freezes		During period of low humidity, static electricity can cause the
		control program to freeze or display incorrect information.
and control pads	Static discharge
		Although this is unlikely, the control can be reset by cycling
do not respond
		power from the disconnect switch.
Condensate
pump does not	Open or short circuit in wiring	Find open or short circuit and repair power to pump.
operate
Continuous		Temperature display will indicate dashes. Check wiring from
	Failed temperature sensor	temperature/humidity board (remote sensors) to the control
Cooling		board or from control board to wallbox. Replace
		temperature/humidity circuit board (remote sensors) or wallbox.
Continuous
Heating	Shorted wiring or failed control	Check wiring and/or replace control board.
Dehumidification	board
Humidification
		Review 5.4.4 - Electrical Connections. Verify VDC between 5
		to 6 Volts at TB-3 Pin 1 (Ground) and TB-3 Pin 2 of the control
		board and wall box. If the transmit lines (TB-3 Pin 3 & 4) are not
		connected, only the POWER LED will be lit. It will flash once
		every 10-12 sec. If T- is connected, but not T+, TX1 will flash
		approximately every 2-3 sec. And the POWER LED will flash
Display Problem		once every 10-12 sec. If T+ and T- are reversed, the POWER
	Incorrect wiring	LED and RX1 Will be lit and flash every 10-12 sec.
		NOTE: Erratic operation of the unit could occur. If no LED is lit,
		there is no power or the +5VDC polarity is reversed. If any of
		these conditions occur, remove power from the evaporator using
		the disconnect switch, and correct wiring from the control board
		to the wall box.
		NOTE: It may take up to 20 seconds for the display to appear on
		the wall box LCD after power is applied.

65 Liebert® Mini-Mate2™