ERM5220R EQUIPMENT REMOTE MODULE
33-00205—01 24
Fig. 20.
M36132
IF THE ISSUE IS NOT RESOLVED, PLEASE CALL THE SUPPORT LINE FROM THE SITE FOR FURTHER TROUBLESHOOTING AT 800-468-1502
BETWEEN 8-4:30 CST M-F.
OUTDOOR UNIT STAGE 1 DOES NOT RUN WITH A CALL FOR HEAT
(HEAT PUMP APPLICATIONS)
L LED IS LIT.
NEITHER D NOR L LED IS LIT.
IS THE COMPRESSOR LED
LIT ON THE ERM5220R?
D LED IS LIT.
THE COMPRESSOR FAULT MONITOR ON
YOUR HEAT PUMP HAS DETERMINED
SOMETHING IS WRONG WITH THE
COMPRESSOR.
HEATPUMP IS IN DEFROST MODE. A MESSAGE IS SENT
FROM ERM TO THERMOSTAT. IF YOU HAVE AUXILIARY
HEAT, THE THERMOSTAT SHOULD BE RUNNING THAT.
YES
NO
NO
IS THE LED ABOVE THE Y TERMINAL LIT
GREEN ON THE ERM5220R?
YES. FLASHING
GREEN
YES. SOLID
GREEN
FLASHING INDICATES MINIMUM OFF TIME FOR
COMPRESSOR. ERM DOES MINIMUM OFF
TIME ON POWER UP, EVEN IF THERMOSTAT
IS SET FOR NO MINIMUM OFF TIME.
ERM IS INDICATING A CALL FOR
COMPRESSOR. MEASURE VOLTAGE
ACROSS THE Y AND C TERMINALS ON ERM.
MEASURE VOLTAGE FROM R
TO C ON ERM. (METER TEST)
0 VOLTS
24 VOLTS
24 VOLTS INDICATES ERM IS SENDING
VOLTAGE TO THE COMPRESSOR WIRES.
DOUBLE-CHECK WIRE CONNECTIONS.
SEE DIAGRAM (FIGURE 11).
24 VOLTS
0 VOLTS
ERM IS NOT LINKED TO THE
THERMOSTAT. SEE PAGES
14-17 FOR ASSISTANCE LINKING.
0 VOLTS INDICATES NO VOLTAGE TO POWER
ERM. IT IS VERY ADD THAT THERE ARE LEDS
LIT ON ERM IF THERE IS NO VOLTAGE.
DOUBLE-CHECK VOLTAGE METER.
WHEN THE COMPRESSOR LED AND Y LED ARE BOTH SOLID GREEN WE WOULD EXPECT VOLTAGE FROM
Y TO C. REPLACE ERM. IF YOU HAVE MORE THAN ONE FAILURE OF THIS TYPE, PLEASE CALL THE SUPPORT
LINE FROM THE SITE FOR FURTHER TROUBLESHOOTING AT 800-468-1502 BETWEEN 8-4:30 CST M-F.
IS THE BOILER LED LIT ON THE ERM5220R?
YES
NO
ADD THE R TO J JUMPER ON ERM
FOR HEAT PUMP APPLICATIONS.
SEE WIRING DIAGRAM (FIGURE 11).
VERIFY CONNECTIONS TO R AND C AND
VERIFY 24 VAC TO THOSE TERMINALS.
SEE WIRING DIAGRAM (FIGURE 11).
UNLIT
SOLID RED
SOLID GREEN
VERIFY THE THERMOSTAT IS SWITCHED TO HEAT OR
AUTO MODE (NOT EMERGENCY HEAT) AND SHOWS
“HEAT ON” IN DISPLAY.
IF THERMOSTAT SHOWS “WAIT” OR “WAITING FOR
EQUIPMENT” THEN WAIT 5 MINUTES FOR THE
COMPRESSOR LOCKOUT DELAY.
IF THERMOSTAT IS CONFIGURED FOR AN OUTDOOR
TEMPERATURE LOCKOUT, AND SHOWS “AUXILIARY
HEAT ON” IN THE SCREEN, THEN IT IS LOCKING OUT
THE OUTDOOR UNIT AND RUNNING THE AUXILIARY HEAT.
WHAT DOES THE CONNECT LED
ON ERM5220R INDICATE?
ERM LOST COMMUNICATION TO THERMOSTAT. CHECK THERMOSTAT
DISPLAY. IF POWER HAD BEEN LOST, WAIT AT LEAST 6 MINUTES
AFTER POWER IS RESTORED FOR LINK TO REESTABLISH. IF LED ON
ERM REMAINS RED, PRESS/HOLD BUTTON ON ERM FOR OVER 10
SECONDS. LED SHOULD GO OUT, COME ON RED, THEN GO OUT
AGAIN. THEN SEE PAGE 16 FOR ASSISTANCE RE-LINKING.
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