Trane 2GN Series, Руководство по установке

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18-GL07D1-4 31
2GN SPLIT INSTALLER’S GUIDE
TROUBLESHOOTING
Standard Microprocessor Controls
To check the unit control board for proper operation:
1. Disconnect thermostat wires at the control board.
2. Jumper the desired test input (Y1, Y2, W, O or G) to the
R terminal to simulate a thermostat signal.
3. If control functions properly:
• Check for thermostat and fi eld control wiring (use
the diagnostic inputs mode).
4. If control responds improperly:
• Ensure that component being controlled is
functioning (compressor, blower, reversing valve,
etc.).
• Ensure that wiring from control to the component is
functioning (refer to the LED Defi nition table below
and use the diagnostic outputs mode).
• If steps above check properly, replace unit control.
Refrigerant Systems
To maintain sealed circuit integrity, do not install service
gauges unless unit operation appears abnormal. Compare
the change in temperature on the air side as well as the
water side to the Operating Parameters tables. If the unit’s
performance is not within the ranges listed, and the airfl ow and
water fl ow are known to be correct, gauges should then be
installed and superheat and subcooling numbers calculated. If
superheat and subcooling are outside recommended ranges,
an adjustment to the refrigerant charge may be necessary.
Notes: Refrigerant tests must be made with hot water
generator turned “OFF”. Verify that air and water fl ow
rates are at proper levels before servicing the refrigerant
circuit.
LED
NORMAL
DISPLAY MODE
DIAGNOSTIC MODES
CURRENT FAULT
STATUS
INPUTS OUTPUTS 1 OUTPUTS 2
FIELD SELECTION
DIPS
SW2- 1 ON SW2- 1 OFF SW2- 1 NA SW2- 1 NA SW2- 1 NA
SW2- 6 ON SW2- 6 ON SW2- 6 OFF SW2- 6 ON SW2- 6 OFF
SW2- 7 ON SW2- 7 ON SW2- 7 ON SW2- 7 OFF SW2-
7 OFF
DRAIN
DRAIN PAN
OVERFLOW
LOCKOUT
DRAIN PAN
OVERFLOW
Y1
COMPRESSOR
(ON OR LOW)
BLOWER
LOW
WATER FLOW
FD THERMISTOR
(LOOP <15º F,
WELL<30ºF)
LOCKOUT
FD THERMISTOR
(LOOP <15º F,
WELL<30ºF)
Y2
COMPRESSOR
(ON OR HIGH)
BLOWER
MEDIUM
HIGH
PRESSURE
HIGH PRESSURE
>600 PSI LOCKOUT
HIGH PRESSURE
>600
O REVERSING VALVE
BLOWER
HIGH
LOW
PRESSURE
LOW PRESSURE <40
PSI LOCKOUT
LOW PRESSURE <40 G FAN AUX HEAT 1
AIRFLOW
ECM2 RPM <100
RPM
ECM2 RPM <100
RPM
W DHW PUMP AUX HEAT 2
STATUS
MICROPROCESSOR
MALFUNCTION
NOT USED SL1 LOOP PUMP 1 AUX HEAT 3
DHW LIMIT
HWL THERMISTOR
>130ºF
HWL THERMISTOR
>130°F
NOT USED LOOP PUMP 2 AUX HEAT 4
DHW OFF
DHW PUMP
SWITCH OFF
DHW PUMP
SWITCH OFF
– – –
LED Defi nitions and Diagnostics
Standard Microprocessor