User Manual
Table Of Contents
- Warranty and Return Policy
- RECEIVING THE AIR CONDITIONER
- HANDLING AND TESTING THE AIR CONDITIONER
- HOW TO READ MODEL NUMBERS
- TECHNICAL INFORMATION
- Sequence of Operation
- Heating
- Cooling
- Thermostat
- Remote Access Control (optional)
- Head Pressure Control
- Contactor (115V 12000 BTU/Hr. Units only)
- Contactor (460V Units only)
- Overload (460V Units only)
- Phase Monitor
- 460V to 230V Transformer
- 115V to 10V or 230V to 10V Transformer (optional)
- 115V to 24V or 230V to 24V Transformer and Relay (optional)
- G521216GXXX Generic Schematic (actual unit options may vary)
- G52 All Other Generic 1-Phase Schematic (actual unit options may vary)
- G52 Generic 3-Phase Schematic (actual unit options may vary)
- G521216GXXX Generic Wire Diagram (actual unit options may vary)
- G52 All Other Generic 1-Phase Wire Diagram (actual unit options may vary)
- G52 Generic 3-Phase Wire Diagram (actual unit options may vary)
- INSTALLATION INSTRUCTIONS
- DIMENSIONAL DRAWINGS
- REMOTE ACCESS CONTROL (optional)
- OPERATING PARAMETERS
- ALARM PARAMETERS
- Remote Access Control Pin-out
- Schematic and Wiring Diagram for Remote Access Control
- G52 1-Phase Generic Schematic (actual unit options may vary)
- G52 Generic 3-Phase Schematic (actual unit options may vary)
- G52 Generic Wire Diagram for Remote Access Control (actual unit options may vary)
- G52 Generic 3-Phase Wire Diagram for Remote Access Control (actual unit options may vary)
- DIMENSIONAL DRAWINGS
- INSTALLATION INSTRUCTIONS WITH REMOTE ACCESS CONTROL
- MAINTENANCE
- Refrigerant Properties Chart (R 134a)
- Functional Data
- 8000 BTU/Hr. Unit Characteristics
- 12000 BTU/Hr. Unit Characteristics
- SERVICE DATA
- Components List
- TROUBLE SHOOTING
© 2018 nVent
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BASIC AIR CONDITIONING TROUBLE SHOOTING CHECK LIST - REMOTE ACCESS
CONTROL VERSION
1. Check manufacturer’s nameplate located on the unit for correct power supply.
2. Turn on power to the unit. The controller will display a start up sequence then revert to the normal
temperature display mode. Is the correct enclosure temperature displayed?
Note: The temperature may be alternating with an alarm code.
YES, proceed to step 3.
NO, possible problem:
» Open controller fuse
» Controller in alarm condition. See ALARM
CONDITION DISPLAY on page 16.
» Defective controller
» Defective thermistor - check by blowing
warm air across the thermistor. If display
temperature rises, thermistor is operable.
Replace part
3. The cooling status indication (symbol G) should be on. Is the symbol on? If not, press and hold the
lower right “snowake” button for greater than ve seconds. Is the cooling mode symbol now on?
YES, proceed to step 4.
NO, possible problem:
» Defective controller
Replace part
4. The evaporator (Enclosure or “COLD” air) fan/impeller should turn on. Is there airow?
YES, proceed to step 5.
NO, possible problem:
» Controller in alarm condition. See ALARM
CONDITION DISPLAY on page 16.
» Open motor winding
» Stuck fan/impeller
» Obstructed blades/wheel
» Defective motor capacitor
Repair or Replace
defective part
5. Check phase monitor indicator light, is it Illuminated?
YES, proceed to step 6.
NO, possible problem:
» Incorrect electrical phasing
De-energize unit and swap any two power
leads to unit. If problem still persists, replace
phase monitor. Refer to phase monitor section
of this manual for additional information.
6. Start the cooling cycle by changing the cooling setpoint parameter (r01) to the low limit of 72 F (22
C). Symbol 1 should be displayed indicating a call for cooling. If symbol 1 is ashing, the unit is in
Restart Time Delay mode. Within 6 minutes, symbol 1 should display without ashing. Is symbol 1
displayed without ashing?
YES, proceed to step 7.
NO, possible problem:
» Unit still in Recycle Time Delay mode
» Enclosure temperature below cooling
setpoint temperature
Wait and/or heat
enclosure thermistor T1