Rheem RRNL Installation Instructions Manual page 108

FIGURE 63
FIGURE 62
Status LED
Green "POWER"
Red "TRIP"
Yellow "ALERT"
LED on Solid
Yellow "ALERT"
Flash Code 2
Yellow "ALERT"
Flash Code 3
Yellow "ALERT"
Flash Code 4
Yellow "ALERT"
Flash Code 5
Yellow "ALERT"
Flash Code 6
Yellow "ALERT"
Flash Code 7
Yellow "ALERT"
Flash Code 8
Yellow "ALERT"
Flash Code 9
• Flash Code number corresponds to a number of LED flashes, followed by a pause and then repeated.
• TRIP and ALERT LEDs flashing at same time means control circuit voltage is too low for operation.
• Reset ALERT Flash code by removing 24VAC power from module.
• Last ALERT Flash code is displayed for 1 minute after module is powered on.
108
Status LED Description
Module has power
Thermostat demand signal
Y1 is present, but the
compressor is not
running
A short circuit or
over-current condition exists
on "P" terminal
System Pressure Trip
Discharge or suction
pressure out of limits or
compressor overloaded
"Lockout"
Short Cycling
Compressor is running
only briefly
"Lockout"
Locked Rotor
"Lockout"
Open Circuit
Missing Phase
"Lockout"
Reverse Phase
"Lockout"
Welded Contactor
Compressor always runs
Low Voltage
Control circuit < 18VAC
3 PHASE UNIT
3 PHASE UNIT
Status LED Troubleshooting Information
Supply voltage is present at module terminals
1. Compressor internal overload is open
2. Broken wire or connector is not making contact
3. Low pressure switch open, if present
4. Compressor contactor has failed
A. Low refrigerant charge
B. Evaportaor blower is not running
C. Evaporator coil is frozen
D. Faulty TXV
E. Condenser coil is dirty
F. Liquid line restriction (filter drier blocked, if present in system)
G. Thermostat is malfunctioning
1. Condenser coil poor air circulation (dirty, blocked, damaged)
Condenser fan is not running
2.
3. Return air duct has substantial leakage
4. If low pressure switch is present:
A. Low refrigerant charge
B. Evaportaor blower is not running
C. Evaporator coil is frozen
D. Faulty TXV
E. Condenser coil is dirty
F. Liquid line restriction (filter drier blocked, if present in system)
G. Thermostat is malfunctioning
1. High head pressure
2. Thermostat demand signal is intermittent
3. T ime delay relay defective, if present
4.
Hot gas sensor defective, if present
1. Low line voltage (contact utility if voltage at disconnect is low)
Excessive liquid refrigerant in compressor
2.
3.
Compressor bearings are seized
Compressor contactor has failed open
1.
2. High pressure switch is open, if present
3.
Open circuit in compressor supply wiring or connections
4.
Unusually long compressor protector reset time due to
extreme ambient temperature
5 .
Compressor windings are damaged
1. Broken wire or connector on one phase
2. Compressor motor winding is damaged
3. Utility supply has dropped one phase
1. Compressor running backwards due to supply phase reversal
1. Compressor contactor has failed closed
2. Thermostat demand signal not connected to module
1. Control circuit transformer is overloaded
2. Low line voltage (contact utility if voltage at disconnect is low)
9 2 - 1 0 1 5 3 4 - 0 4 - 0 0
CM 0109
107