Honeywell REDLINK ERM5220R Product Data page 25

HEAT RUNS WITH A CALL FOR COOLING (HEATPUMP)
IS THE LED ABOVE THE Y TERMINAL
LIT GREEN ON THE ERM5220R?
IS THE LED ABOVE THE O/B TERMINAL
LIT GREEN ON THE ERM5220R?
YES
THIS INDICATES THAT THE
THERMOSTAT IS CONFIGURED TO
ENERGIZE THE CHANGEOVER IN
COOLING MODE. IS THIS CORRECT?
NO
RECONFIGURE THE
THERMOSTAT TO ENERGIZE
CHANGEOVER IN HEAT MODE.
MEASURE VOLTAGE ACROSS THE
O/B AND C TERMINALS ON ERM.
0 VOLTS
MEASURE VOLTAGE
FROM R TO C ON
ERM. (METER TEST)
24 VOLTS 0 VOLTS
0 VOLTS INDICATES NO VOLTAGE
TO POWER ERM. IT IS VERY ODD
THAT THERE ARE LEDS LIT ON ERM
IF THERE IS NO VOLTAGE. DOUBLE-
CHECK VOLTAGE METER.
WHEN THE COMPRESSOR LED AND O/B LED ARE BOTH SOLID GREEN WE WOULD EXPECT VOLTAGE FROM
O/B 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.
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.
IS THE COMPRESSOR LED LIT ON THE ERM5220R?
YES
YES
ERM SHOULD NOT BE RUNNING HEAT OR COOLING AT THIS TIME.
PLEASE CALL THE SUPPORT LINE FROM THE SITE FOR FURTHER
NO
TROUBLESHOOTING AT 800-468-1502 BETWEEN 8-4:30 CST M-F.
NEITHER HEAT NOR COOL SHOULD BE RUNNING. VERIFY CONNECTIONS TO R AND
C AND VERIFY 24 VAC TO THOSE TERMINALS. SEE WIRING DIAGRAM (FIGURE 11).
THIS INDICATES THAT THE THERMOSTAT IS CONFIGURED TO
ENERGIZE THE CHANGEOVER IN HEAT MODE. IS THIS CORRECT?
YES
RECONFIGURE THE THERMOSTAT TO
ENERGIZE CHANGEOVER IN COOL MODE.
0 VOLTS INDICATES ERM IS NOT SENDING VOLTAGE TO THE CHANGE-
24 VOLTS
OVER VALVE WIRE. THE HEATPUMP SHOULD RUN IN COOL WHEN THE
CHANGEOVER IS NOT ENERGIZED. ISSUE IS NOT WITH ERM.
24 VOLTS INDICATES ERM IS CORRECTLY SENDING VOLTAGE
TO THE CHANGEOVER VALVE WIRE. DOUBLE-CHECK WIRE
CONNECTIONS. SEE FIGURE 11.
WHEN THE O/B LED IS UNLIT WE WOULD NOT EXPECT VOLTAGE FROM O/B TO C.
DISCONNECT WIRE FROM O/B AND RE-TAKE READING ACROSS O/B TO C TERMINALS.
IF YOU NO LONGER HAVE VOLTAGE, THE O/B WIRE IS SHORTED. IF YOU STILL HAVE
VOLTAGE FROM O/B 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.
25
ERM5220R EQUIPMENT REMOTE MODULE
NO
IS THE BOILER LED LIT ON THE ERM5220R?
NO
ADD THE R TO J JUMPER ON ERM FOR HEATPUMP
APPLICATIONS. SEE WIRING DIAGRAM ON PAGE 11.
NO
MEASURE VOLTAGE ACROSS THE O/B AND C TERMINALS ON ERM.
Fig. 21.
YES
YES
0 VOLTS 24 VOLTS
NO
M36133
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