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12/06/2012 33
GI202
ECM FAULT CODES, GENTEQ 3.0 (ECM RPM LED)
1 Pulse = Control temperature above threshold
2 Pulses = Risk Addressed State (RAS), motor locked out
3 Pulses = Start procedure failed or speed too low
4 Pulses = Brownout – supply voltage too low
5 Pulses = Start not successful
6 Pulses = RPM = 0
Service Tips
1.
If experiencing both pulsing at same time or both solid ECM LED’s and the program goes to halt,
check:
a.
ECM motor power cable
b.
ECM control cable
c.
Motor size dial switch setting
d.
Correct motor for the unit model number/type
2.
The LED indicated program halt condition requires power-down/power-up reset to clear.
3.
Fault codes 2 and 6 cause an immediate hard lockout.
4.
Fault codes 1, 3, 4, 5 or no motor data cable communication response will cause a soft lockout as
described in the CSL section.
5.
The ECM 3.0 motor has an internal safety function which should overcome potential software
communication problems.
a.
Will continue at its present operating point.
b.
If in idle (after stop and no start command) it will stay in idle.
c.
If running, it will continue running at CFM established by last good data transfer.
d.
Above mode is set until loss of power or new successful data transfer.
FAULT COUNT (Red LED, left side next to model size dial switch)
Normally OFF
Counts out a code for the current fault (see Fault Codes)
PROGRAM FAULT CODES (FAULT COUNT LED):
1 Pulse = Lost Source Flow
2 Pulses = Refrigerant High Pressure Limit (550 psi)
3 Pulses = Refrigerant Low Pressure Limit (40 psi)
4 Pulses = Loss of refrigerant charge
5 Pulses = Under Voltage detect (source voltage less than 195 volts)
6 Pulses = CDT Safety Limit (230 degrees)
7 Pulses = See ECM Motor Fault section
8 Pulses = Lost load water flow (THA & THT units only)
9 Pulses = Leaving source water or load freeze limit
Summary of Contents for TVA series
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