Section 9 - Troubleshooting
Figure 8 - Troubleshooting Chart - NO AIR FLOW
20
NO AIR FLOW
ENSURE UNIT IS
PLUGGED IN
UNPLUG UNIT; CHECK
CIRCUIT BREAKER
REPAIR/REPLACE
IS
RFU LIT?
CALL
YOUR DEALER
UNPLUG
UNIT AND
OPEN IT
REINSTALL
FILTER
IS S2
OR S3
TRIPPED?
RESET
S2, S3
IS RT1
THERMISTOR ASSY
CONNECTED?
PERFORM FUNCTION CHECK--
POSSIBLE CAUSES:
1. TOO HIGH STORAGE TEMP
2. UNIT OUT OF CAL.
3. LOW SPEC ON S2, S3
PERFORM
FUNCTIONAL
CHECK
DOES RFU
REOCCUR?
POSSIBLE CONTROLLER
FAILURE; CALL
YOUR DEALER
RUN UNIT IN
32°C SETTING
FOR 10 MINUTES
S4 HAS
TRIPPED
RESET S4
IS THERE A
BLOCKED,BENT,
OR MISALIGNED
BLOWER WHEEL?
POWER UP
UNIT.
AIRFLOW?
REPAIR/REPLACE
MOTOR
NO
YES
NO
YES
IS CIRCUIT
BREAKER LIT?
IS FILTER
INSTALLED
CORRECTLY?
REMOVE BLOCKAGE;
REPLACE/ALIGN
BLOWER WHEEL
RECONNECT RT1
THERMISTOR
ASSEMBLY
YES
YES
NO
YES
NO
YES
NO
YES
NO
NO
PERFORM
FUNCTIONAL
CHECK
NO
YES
SYMPTOM:
