DST RL-61 - Capacity Troubleshooting; FIGURE 22: Capacity Troubleshooting and Solution Table

22 RL-61, 61L EN.033 24.01Seibu Giken DST
EN
9.3 CAPACITY TROUBLESHOOTING
The dehumidier performance can be roughly checked by feeling the temperature of the uninsulated duct work near the unit.
PROBLEM OBSERVATION SOLUTION
The dehumidier does not
maintain required condition or
achieve expected performance,
despite being operated at full
power.
Dry air outlet duct is warm and wet
air outlet duct is very warm (normal
operation).
Check actual moisture load against calculated design moisture load.
Check controller setpoint/output signal.
Check airows are set as specied, adjust as necessary.
Check air lters.
Check dehumidier casing and duct work for air leakage.
Check rotor alignment and condition of radial and peripheral rotor seals.
Both outlet air ducts are cold (no alarm).
Check regeneration airow and fan operation.
Check regeneration heater operation.
Check controller setpoint/output signal.
Check TH2 setting.
Dry air outlet duct is cold, wet air outlet
duct is hot (no alarm).
Check rotor rotation.
Check process airow and fan operation.
The regeneration heater light indicator is
not turning on or ashing.
Check regeneration airow - Remove blockages or open dampers on the regeneration
airow.
Check pressure switch and setting. Note: N/A for R-51/60.
Check regeneration fan.
Check TH2 thermostat and setting.
Check TRIAC and cooling fan.
None or low regeneration airow is
detected.
Measured airows are lower than
specied.
Fan is not rotating in direction indicated by
arrow on fan motor casing. The incoming
phase supply is incorrect.
Isolate mains electrical power supply to the unit.
Change over two of the three incoming phase supply wires. Re-check fan rotation.
FIGURE 22: Capacity troubleshooting and solution table