Table 7-1.—CommonTroubles, Causes, and Remedies on Shipboard Laundry DryersTROUBLENo steam tosteam bonnetCAUSETrap installedincorrectlySupply line valveclosedREMEDYCheck trap for inlet and outlet markings. Install trap according tomarkings.Open valves in supply and in the return lines.Check valveinstalled incorrectlyStrainer cloggedCheck for inlet and outlet marking on check valve, and invert ifnecessary.Remove plug and blow down strainer or remove and cleanthoroughly if heavily clogged.Water in steamlineSteam pipingCheck piping per steam installation instructions.installed incorrectlyTrap not functioningCheck trap for size and capacity. If dirty and sluggish cleanthoroughly or replace. Check return line for high back pressure, oranother trap charging against the trap functioning improperly.Motors won’tstartNo powerIncorrect currentCheck fuses on circuit breakers, make sure main control switch ison. Request an electrician.Check power source. Voltage, phase, and frequency must be thesame as specified on electrical rating plate. Request an electrician.Time offOverload relaystrippedTurn timer clockwise to desired time setting. Rush reset buttons oncontrol box. Request an electrican.Loose wiringConnectionsCheck all terminal connections. Request an electrician.Defective startingrelayCheck coils and contacts. Request an electrician.Fan motor onlyLoading door openClose door.runsDoor switch out ofAdjust switch by removing cover and bending actuator lever toadjustmentclear switch button 3/8” with cover in place.Defective DoorReplace switch.switchDryer runs nosteam to coilsValves closedSteam trap blockedCheck all valves in steam supply & return to make sure they areopen.Remove and clean. Replace if defective.presses. Both types of presses require the right amounthydrostatically tested annually as specified by theof steam pressure for heating. You, as themanufacturer’s manual.If not specified in themaintenanceman, must make sure safety devices are notmanufacturer’s manual, test to 150 lb/sq. inch accordingbypassed. All press heads and bucks should beto chapter 655 of NSTM for 1 minute.7-4
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