Troubleshooting - Bryant Gt 024 Installation Instructions Manual

TROUBLESHOOTING

GT Series Water Source Heat Pump is equipped with an externally
mounted LCD screen that displays unit errors. (See Fig. 24)
Fig. 24 - - GT Unit Error LCD Screen
UPM Board LED Indications
Indication
Blinks
Color
GREEN Solid
RED 1
RED 2
RED 3
RED 4
RED 5
RED 6
Problem
NO FLOW
LOW FLOW
HIGH WATER
TEMPERATURE
LOW HEAT OUTPUT Scaled or fouled heat exchanger
Description
18-30 VAC Power is present
High pressure lockout
Low pressure lockout
Freeze sensor lockout
Condensate overflow
Brownout
Evaporator Freeze condition
HRP Troubleshooting
Possible Cause
No Power
On/Off Switch Position
Compressor Contactor
Broken or loose wires
Air Lock
Stuck pump shaft/impeller
Defective pump
Kinked or under sized water piping
Water temp limit closed
IMPORTANT: The following Troubleshooting tables are
designed to help identify possible causes and solutions for
problems. There could be more than one cause/solution to a
problem that can be applied. Check each cause and adopt
"process of elimination" and/or verification of each before
making a conclusion.
A14134
Model
GT024
GT036
GT048
GT060
GT072
Tolerance +/- 7%. All resistance values must be measured with
compressor at room temperature.
Check power supply
Set switch to "ON" position
Engage heat pump contactor
Repair or tighten wires
Purge air from piping system
Remove pump cartridge and clean
Replace pump
Repair kink and check for proper line size
Stuck limit switch
Sensor not attached securely to line
Clean heat exchanger
23
Compressor Ohms
Start Winding Run Winding
1.64
1.52
1.86
1.63
1.85
Checks and Corrections
1.3
0.88
0.52
0.39
0.34