Honeywell PC8900A Manual page 43

SYMPTOM
HUMIDIFICATION EQUIPMENT
WILL NOT COME ON IN
HEATING.
GREEN LED ON W8900 IS NOT
OPERATING.
DEHUMIDIFICATION EQUIPMENT
(COOLING) WILL NOT COME ON
IN COOLING.
VENTILATION EQUIPMENT
WILL NOT COME ON.
VENTILATION EQUIPMENT IS
RUNNING INDEPENDENT
OF PC8900.
TEMPERATURES ARE
DISPLAYED IN C.
TIME IS DISPLAYED IN MILITARY
TIME (EX: 14:00).
DISCHARGE AIR TEMPERATURE
NOT DISPLAYED WHEN CHECK
KEY IS PRESSED.
POSSIBLE CAUSE
PC8900 IS NOT CONFIGURED PROPERLY.
HUMIDITY SETTING IS TO LOW.
PC8900 IS CONFIGURED FOR FROST
CONTROL.
NO POWER TO HUMIDIFIER.
NO POWER TO W8900.
PC8900 IS NOT CONFIGURED PROPERLY.
HUMIDITY SETTING IS TO HIGH.
EQUIPMENT COMPRESSOR PROTECTION
ACTIVATED.
NO POWER TO DEHUMIDIFIER (COOLING)
EQUIPMENT.
PC8900 IS NOT CONFIGURED PROPERLY.
NO POWER TO VENTILATION
EQUIPMENT.
A HIGH CO CONDITION EXISTS IN THE
2
LIVING SPACE.
A REMOTE SWITCH IS CALLING FOR
VENTILATION.
PC8900 IS NOT CONFIGURED PROPERLY.
PC8900 IS NOT CONFIGURED PROPERLY.
PC8900 IS NOT CONFIGURED FOR
DISCHARGE AIR TEMPERATURE.
POWER OUTAGE HAS REMOVED
DISCHARGE AIR TEMPERATURE
FROM DISPLAY.
Fig. 41. Troubleshooting procedures ( Continued ).
43
ACTION
• RECONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING
(APPLIES TO W8900A,B ONLY).
• ADJUST HUMIDITY SETTING USING
• TO PREVENT FROST FROM FORMING ON WINDOWS, SOME
CALLS FOR HUMIDIFICATION WILL NOT BE ALLOWED. REFER
TO INSTALLATION AND OPERATION SECTION.
• CHECK SYSTEM FUSE OR CIRCUIT BREAKER AND REPLACE
OR RESET IF NECESSARY.
• CHECK THAT EQUIPMENT POWER IS ON.
• CHECK FOR LOOSE CONNECTIONS ON EQUIPMENT, PC8900
AND W8900.
• CHECK SYSTEM FUSE OR CIRCUIT BREAKER AND
REPLACE OR RESET IF NECESSARY.
• CHECK THAT COOL SYSTEM POWER IS ON.
• CHECK FOR LOOSE CONNECTIONS AT PC8900, W8900,
C7189, OR EQUIPMENT.
• RECONFIGURE PC8900 FOR HUMIDITY CONTROL IN COOLING
(APPLIES TO W8900A,B ONLY).
• ADJUST HUMIDITY SETTING USING
• EQUIPMENT HAS A MINIMUM-OFF TIME TO PROTECT THE
COMPRESSOR (IF ACTIVATED). ALLOW UP TO FIVE MINUTES
AFTER CHANGING THE SETTING BEFORE THE COMPRESSOR
STARTS.
• CHECK SYSTEM FUSE OR CIRCUIT BREAKER AND REPLACE
OR RESET IF NECESSARY.
• CHECK THAT EQUIPMENT POWER IS ON.
• CHECK FOR LOOSE CONNECTIONS ON EQUIPMENT PC8900
AND W8900.
• RECONFIGURE PC8900 FOR VNT OR OUTSIDE AIR DAMPER.
• CHECK SYSTEM FUSE OR CIRCUIT BREAKER AND REPLACE
OR RESET IF NECESSARY.
• CHECK THAT EQUIPMENT POWER IS ON.
• CHECK FOR LOOSE CONNECTIONS AT PC8900, W8900 OR
VENTILATION EQUIPMENT.
• WHEN CO SENSOR SENSES HIGH CO
2
FAN AND VENTILATION ARE ACTIVATED TO VENTILATE LIVING
SPACE.
• TURN REMOTE SWITCH OFF.
• RECONFIGURE PC8900 FOR F.
• RECONFIGURE PC8900 FOR 12 HOUR CLOCK.
• RECONFIGURE PC8900 FOR DISCHARGE AIR TEMPERATURE.
• ENTER INSTALLER SET UP MODE FOR A FEW SECONDS.
AFTER LEAVING SET UP MODE, DISCHARGE AIR
TEMPERATURE IS DISPLAYED UNTIL NEXT POWER OUTAGE.
AND KEYS.
AND KEYS.
CONDITION, SYSTEM
2
M18744
68-0173—3