Emerson MINI-MATE2 Bedienungsanleitung Seite 70
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Troubleshooting
Liebert
®
Mini-Mate2
™
64
11.0 TROUBLESHOOTING
Table 25 Troubleshooting
Symptom Possible Cause Check Or Remedy
Unit will not start
No power to unit Check voltage at input terminal block.
Control voltage circuit breaker (at
transformer) open
Locate short and reset circuit breaker.
Float switch relay closed
because of high water in the
condensate pan
Has rubber band been removed from float switch? Check drain
and line. Access through left panel. Power must be cycled at the
disconnect to reset.
Jumper not in place
Check terminal TB1-4 and TB1-5 for jumper or N/C contact.
Check pins 1-8 and 1-9 for jumper or N/C high temperature
sensor contact. Check pins 5-4 and 5-5 for jumper or N/C smoke
sensor contact.
No cooling
Cooling not displayed at the
control panel
Adjust TEMP control
set point and sensitivity to require cooling.
Short cycle prevention control
Control software delays compressor 3 minutes cooling, from stop
to start
Compressor contactor not pulling
in
Check for 24 VAC ± 2 VAC at terminals P4-8 and P4-4. If voltage,
check contactor. If no voltage at P4-8 and P4-4, check at
terminals P2-3 and P2-8. If voltage, check freeze stat.
Compressor high head pressure See below for cause.
Plugged filter/dryer Replace filter/dryer
Low refrigerant charge
Check pressure gauges. At low ambient temperatures, proper
refrigerant charge is very important on units with Lee-Temp
receivers.
Compressor high
head pressure
Insufficient air flow across
condenser coil
Remove debris from coil and air inlets.
Water/Glycol Cooled only: No
fluid flowing through condenser
Check fluid supply to regulating valve. Adjust valve if necessary.
Condenser fan not operating Check fan operation.
Humidifier does
not operate
DIP switch not set to enable
humidifier option
See DIP switch settings Table 24.
“HUMIDIFY” not displayed at
control panel
Increase humidity control
set point and sensitivity to require
humidification.
Defective board
Check voltage at P3-1 and P1-9 on interface board for 24 VAC
± 2 VAC. If no voltage, check wiring and/or replace board. Check
wiring from control panel to board.
Failed humidity sensor
Humidity display will indicate dashes. Check wiring from
temperature/humidity board to the control board and from the
wall box to the control board. Replace wallbox or
temperature/humidity circuit board (if remote).
No water flow
Make sure switch is in Run position. Check humidifier water
supply (including filter screen) and check nylon overflow line if
canister is full.
Canister fill rate is not keeping up
with the steam output
Check fill valve screen opening and capillary tube for
obstructions. Check water supply pressure (minimum 10 PSIG).
Reheat will not
operate
DIP switch not set to enable
reheat option
See DIP switch settings Table 24.
HEAT not displayed at the
control panel
Increase temperature
set point to require heating.
Reheat safety open, defective
reheat contact or defective board
Check voltage at P2-1 and P1-9 on interface board for 24 VAC ±
2 VAC. If voltage, check reheat contactor and reheat safety. If no
voltage, check wiring and/or replace board.
Element is burned out Turn off power. Check element continuity with an Ohmmeter.
- Mini-Mate2 1
- 2
- TABLE OF CONTENTS 3
- SAVE THESE INSTRUCTIONS 7
- Important Safety Instructions 8
- MMD60E7CHELA 9
- MCD65ALAH7 9
- PFH067A-AL7 10
- MCD69W2AH7 10
- M M D 92 C 2 C H E L A 11
- 1.0 INTRODUCTION 12
- 2.3 Chilled Water Units 13
- 2.4 System Controls 14
- 3.3 Sensors 15
- 3.4 Switches and Motors 15
- 3.1 Reheat 15
- 3.2 Humidifier 15
- 3.5 Free-Cooling 16
- 11 Liebert 17
- 13 Liebert 19
- 5.1.1 Room Preparation 20
- 5.2 Ceiling Unit Weights 22
- Filter Box 23
- Drain Line 24
- Humidifier Water Supply Line 24
- Quick Connect Fittings 27
- DPN000218 28
- 5.4.4 Electrical Connections 29
- Power Connections 30
- Control Connections 30
- 25 Liebert 31
- 27 Liebert 33
- AIR-COOLED DIMENSIONAL DATA 34
- AIR COOLED 35
- DPN000226 35
- CHILLED WATER 36
- AIR-COOLED 36
- (Split System) 36
- 18" 37
- DPN000131 38
- 33 Liebert 39
- WATER/GLYCOL DIMENSIONAL DATA 40
- DPN000228 41
- WATER/GLYCOL 41
- 5.8.1 Free-Cooling Coil 42
- DPN000219 43
- 6.0 MICROPROCESSOR CONTROL 45
- 6.2 Main Menu <Menu> 46
- 6.3 Setpoints 46
- 6.4 Status 47
- 6.5 Active Alarms 47
- 6.6 Time 47
- 6.7 Date 47
- 6.8 Setback 47
- 6.9 Setup Operation 48
- 6.10 Change Passwords 49
- 6.11 Calibrate Sensors 49
- 6.12 Alarm Enable 50
- 6.13 Alarm Time Delay 50
- 6.14 Common Alarm Enable 50
- 6.15 Custom Alarms 51
- 6.16 Custom Text 51
- Equipment Options Switches 52
- Show Inputs 52
- Test Outputs 53
- Test Control Board 53
- Figure 27 Control menu 54
- Figure 29 Wall box board 55
- 7.1 Temperature Control 56
- 7.2 Humidity Control 56
- 7.3 Load Control Features 57
- 8.0 ALARMS 58
- 53 Liebert 59
- 8.2 Optional/Custom Alarms 60
- 9.1 System Testing 61
- 9.2.3 Blower System 62
- Air Distribution 62
- 9.2.4 Blower Removal 62
- 9.2.5 Refrigeration System 62
- Suction Pressure 62
- Hot Gas Bypass 64
- 9.3 Replacement Procedures 65
- Replace a Failed Compressor 66
- 61 Liebert 67
- 63 Liebert 69
- 11.0 TROUBLESHOOTING 70
- Table 25 Troubleshooting 71
- SL-10532_REV3_02-13 72
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